Double-infrared-component external synchronous sampling imaging method based on azimuth code

Abstract

The invention discloses a double-infrared-component external synchronous sampling imaging method based on an azimuth code. A double-infrared area array detector scanning imaging system is adopted, and the method comprises the following steps that: 1, an azimuth code acquisition board continuously acquires azimuth codes when performing 360-degree constant-speed scanning along with an azimuth turntable, and generates external synchronizing signals according to the azimuth codes; 2, the azimuth code acquisition board sends an external synchronization signal to a first infrared assembly and a second infrared assembly at the same time; 3, after the first infrared assembly and the second infrared assembly receive the external synchronizing signal, integral imaging is started respectively, and a first infrared image and a second infrared image are formed; 4, when the first infrared assembly and the second infrared assembly receive the external synchronizing signal, trigger signals are generated and sent to the first fast scanning mirror and the second fast scanning mirror respectively; 5, the first fast scanning mirror and the second fast scanning mirror start to swing back to scan the compensation image after receiving the trigger signal; the first fast scanning mirror and the second fast scanning mirror are matched with the rotating speed of the azimuth turntable to swing in opposite directions, so that images of the first infrared assembly and the second infrared assembly are relatively static during integral imaging, and the trailing problem is avoided.

Description

Technical Field

[0001] The invention relates to the field of signal processing, in particular to an external synchronous sampling imaging method of dual infrared components based on azimuth codes. Background Art

[0002] Compared with the linear detection system, the infrared surface array scanning imaging system has the characteristics of strong detection capability and high scanning efficiency, and is one of the current research hotspots in the infrared field. However, during the detector integration time, the detector rotates at a uniform speed with the azimuth turntable, that is, the imaged scene moves relative to the detector target surface, which will cause the image to have a tailing problem. Therefore, a fast scanning mirror is introduced. When the turntable rotates at a uniform speed and the detector is integrated and imaged, the fast scanning mirror swings back in the opposite direction in coordination with the turntable speed, so that the imaged scene is stationary relative to the detector, thereby solving the tailing problem.

[0003] The use of a double-sided array detector placed vertically can further expand the pitch field of view and improve detection efficiency. When a double-sided array detector is placed on the same azimuth turntable for 360° scanning imaging, the following problems will occur: (1) The image acquisition time of the two detectors is inconsistent, and the back-end target extraction cannot be synchronized; (2) The imaging azimuth angles of the two detectors are inconsistent, resulting in the inability to synchronize the panoramic image stitching; (3) When the system scans, the coordinates of the same scene in the same component are inconsistent, and the image shakes significantly. Summary of the invention

[0004] The purpose of the present invention is to provide a dual infrared component external synchronous sampling imaging method based on azimuth code, which solves the problem of dual detector synchronous 360° scanning imaging in the prior art and provides a guarantee for subsequent image processing and target detection based on dual detectors.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution of the present invention is:

[0006] A dual infrared component external synchronous sampling imaging method based on azimuth code, the imaging system used in the method includes two infrared components, two fast scanning mirrors, an azimuth code acquisition board, and an azimuth turntable; the infrared component uses an infrared outer array detector; the method is characterized in that the steps include:

[0007] Step 1: The azimuth code acquisition board continuously acquires azimuth codes while scanning at a constant speed of 360° with the azimuth turntable, and generates an external synchronization signal according to the azimuth codes;

[0008] Step 2: The azimuth code acquisition board sends the external synchronization signal to the first infrared component and the second infrared component at the same time;

[0009] Step 3: After receiving the external synchronization signal, the first infrared component and the second infrared component start integrating imaging to form a first infrared image and a second infrared image respectively;

[0010] Step 4: When receiving the external synchronization signal, the first infrared component and the second infrared component generate a trigger signal and send the trigger signal to the first fast scanning mirror and the second fast scanning mirror respectively;

[0011] Step 5: The first fast scanning mirror and the second fast scanning mirror receive a trigger signal and start to swing back to scan and compensate the image; the first fast scanning mirror and the second fast scanning mirror swing in opposite directions in coordination with the rotation speed of the azimuth turntable to ensure that the images of the first infrared component and the second infrared component are relatively still during integral imaging without causing tailing problems.

[0012] The dual infrared component external synchronous sampling imaging method based on azimuth code is characterized by further comprising step 6, synchronous image output of two infrared outer array detectors.

[0013] The dual infrared component external synchronous sampling imaging method based on azimuth code is characterized in that the infrared surface array detectors of the first infrared component and the second infrared component are placed vertically for use.

[0014] The dual infrared component external synchronous sampling imaging method based on azimuth codes in the present invention utilizes azimuth codes to generate external synchronization signals to ensure synchronous integral imaging of the two infrared components and synchronous swinging of the two scanning mirrors, thereby solving the problem of synchronous scanning imaging of the dual detectors and providing a guarantee for subsequent image processing and target detection based on the dual detectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the imaging system in the method of the present invention.

[0016] Figure 2 It is a schematic flow diagram of the method of the present invention. DETAILED DESCRIPTION

[0017] The present invention discloses a dual infrared component external synchronous sampling imaging method based on azimuth code. Figure 1 As shown: the imaging system used in this method includes two infrared components (first infrared component, second infrared component), two fast scanning mirrors (first fast scanning mirror), an azimuth code acquisition board, and an azimuth turntable; the infrared component uses an infrared surface array detector. Figure 2 As shown: The method steps include:

[0018] Step 1: The azimuth code acquisition board continuously acquires azimuth codes while scanning at a constant speed of 360° with the azimuth turntable, and generates an external synchronization signal according to the azimuth codes;

[0019] Step 2: The azimuth code acquisition board sends the external synchronization signal to the first infrared component and the second infrared component at the same time;

[0020] Step 3: After receiving the external synchronization signal, the first infrared component and the second infrared component start integrating imaging to form a first infrared image and a second infrared image respectively;

[0021] Step 4: When receiving the external synchronization signal, the first infrared component and the second infrared component generate a trigger signal and send the trigger signal to the first fast scanning mirror and the second fast scanning mirror respectively;

[0022] Step 5: The first fast scanning mirror and the second fast scanning mirror receive a trigger signal and start to swing back to scan and compensate the image; the first fast scanning mirror and the second fast scanning mirror swing in opposite directions in coordination with the rotation speed of the azimuth turntable to ensure that the images of the first infrared component and the second infrared component are relatively still during integral imaging without causing tailing problems.

[0023] The method of the present invention also includes step 6, synchronous image output of two infrared surface array detectors.

[0024] In the present invention, the infrared array detectors of the first infrared component and the second infrared component are placed vertically for use.

[0025] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A dual infrared component external synchronous sampling imaging method based on azimuth code, the imaging system used in this method includes two infrared components, two fast scanning mirrors, an azimuth code acquisition board, and an azimuth turntable; The infrared component uses an infrared array detector; its characteristics are: The method steps include: Step 1: The azimuth code acquisition board continuously acquires azimuth codes while scanning at a constant speed of 360° with the azimuth turntable, and generates an external synchronization signal according to the azimuth codes; Step 2: The azimuth code acquisition board sends the external synchronization signal to the first infrared component and the second infrared component at the same time; Step 3: After receiving the external synchronization signal, the first infrared component and the second infrared component start integrating imaging to form a first infrared image and a second infrared image respectively; Step 4: When receiving the external synchronization signal, the first infrared component and the second infrared component generate a trigger signal and send the trigger signal to the first fast scanning mirror and the second fast scanning mirror respectively; Step 5: The first fast scanning mirror and the second fast scanning mirror receive a trigger signal and start to swing back to scan and compensate the image; the first fast scanning mirror and the second fast scanning mirror swing in opposite directions in coordination with the rotation speed of the azimuth turntable to ensure that the images of the first infrared component and the second infrared component are relatively still during integral imaging without causing tailing problems.

2. The dual infrared component external synchronous sampling imaging method based on azimuth code according to claim 1 is characterized in that: The method also includes step 6, wherein two infrared array detectors synchronously output images.

3. The dual infrared component external synchronous sampling imaging method based on azimuth code according to claim 1 or 2, characterized in that: The infrared array detectors of the first infrared component and the second infrared component are placed vertically for use.

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