Two-way control method for eliminating imaging rotation of scanning imaging system

A two-way control, scanning imaging technology, applied in the direction of using feedback control, etc., can solve the problems that it is difficult to realize the strict coordinated movement of the scanning mirror and the derotation mechanism, and the transmission accuracy is low, so as to improve maintainability, improve precision, reduce volume effect

Active Publication Date: 2013-09-18
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The present invention solves the existing problem of using mechanical linkage, or motor servo combined with mechanical linkage to eliminate image rotation, resulting in low transmission accuracy, or adopting motor servo drive, b

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  • Two-way control method for eliminating imaging rotation of scanning imaging system
  • Two-way control method for eliminating imaging rotation of scanning imaging system
  • Two-way control method for eliminating imaging rotation of scanning imaging system

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specific Embodiment approach 1

[0020] Specific implementation mode one, combination Figure 1 to Figure 4 To explain this embodiment, the 45° scanning mirror of the imaging system in the bidirectional control method for eliminating image rotation in the scanning imaging system described in this embodiment is driven by a set of motor servo system, called a scanning mirror servo motor; derotation prism Or the imaging component is driven by another set of motor servo system, called the derotation mechanism servo motor; there is no mechanical connection between the two, and the two sets of servo systems are coordinated by a four-channel two-way controller, which is a two-way control algorithm. .

[0021] Specifically include: two single-motor command tracking controllers, two equal-force moment estimators, and a position controller in a four-channel bidirectional controller; a single-motor command tracking controller A acting on the scanning mirror servo motor receives the scanning mirror rotation Command, contro...

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Abstract

The invention discloses a two-way control method for eliminating imaging rotation of a scanning imaging system, relates to the technical field of imaging, and solves the problems that the existing imaging rotation elimination methods using mechanical linkage or combination of a servo motor and the mechanical linkage results in low transmission accuracy, or meanwhile strictly coordinated movement of a scanning mirror and a rotation eliminating mechanism is hard to achieve by adopting the servo motor to drive to eliminate the imaging rotation. The two-way control method includes steps of adopting a single motor command tracking controller to receive a rotation command of the scanning mirror, and controlling rotation of a scanning mirror servo motor and a rotation eliminating mechanism servo motor respectively; adopting a torque estimator to estimate equivalent driving torques acted on a motor shafting by the single motor command tracking controller to provide torque information for a four-channel two-way controller. According to the arrangement, positions and torques between two servo systems of the scanning mirror servo motor and the rotation eliminating mechanism servo motor are mix-controlled to realize electrical linkages of the same. Besides, coordinated movement performance between the scanning mirror and the rotation eliminating mechanism in a servo motor rotation eliminating system is improved.

Description

Technical field [0001] The invention relates to a motion control method for eliminating image rotation of a scanning imaging system, and belongs to the field of imaging technology. Background technique [0002] In the imaging system, the field of view of the optical lens limits the imaging range. Using lateral scanning is an effective way to expand the coverage of the imaging system. In order to reduce the moment of inertia of the scanning mechanism, a 45° scanning mirror is usually installed in front of the lens, and horizontal scanning is realized by controlling the rotation of the scanning mirror. However, the rotation of the scanning mirror will cause the image of the target scene to rotate on the image plane. In order to ensure the image integrity of scanned imaging, a high-precision derotation system must be designed. [0003] In order to eliminate image rotation, a derotation prism is often used in conjunction with a 45° scanning mirror to keep the rotation angle of the d...

Claims

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Application Information

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IPC IPC(8): G05D3/20
Inventor 田大鹏王德江
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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