Focusing and zooming system based on FPGA

Abstract

The present invention relates to a focusing and zooming system based on FPGA, which comprises a level switch circuit, an optocoupler, an optocoupler configuration circuit, a programmable logic device FPGA, a focusing and zooming drive circuit. A man-computer interaction module sends a focusing and zooming command to the programmable logic device FPGA through the level switch circuit. The programmable logic device PFGA sends motor positive and negative rotation control logic to the focusing and zooming drive circuit according to the control command sent by the level switch circuit, and provides a voltage value required by the positive and negative rotation of the motor. When the focusing and zooming motor controls the camera to rotate to the limited position, the optocoupler used as a sensor sends a position limitation signal to the FPGA module so that the FPGA module quickly sends motor rotation stopping logic to the focusing and zooming drive circuit. Because the core of the whole control process is realized by the programmable logic device FPGA, compared with the singlechip, the parallelization of the focusing process and the zooming process is realized, and the phenomenon that the circuit is burnt because of the locked rotor of the motor is avoided, the degree of stability of the system is simultaneously improved and the cost is reduced.

Description

technical field [0001] The invention relates to the field of photoelectric detection. An FPGA-based focusing and zooming system can adjust the focus and zoom of a camera according to the specific requirements of photoelectric detection, so that the target to be detected can be clearly imaged on the screen, so as to facilitate photoelectric detection. Background technique [0002] In the field of photoelectric detection, in the past, the focus and zoom of the camera were mostly controlled by a single-chip microcomputer. Its advantage is that it is easy to program and realize. The single-chip microcomputer is used to realize the zooming and zooming of the camera, because it is required to control the camera in real time, and the programming of the program is mostly realized by querying, which keeps the single-chip microcomputer in a very busy state all the time, and the utilization rate is reduced. Due to the limitation of the single chip microcomputer itself, it cannot reali...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a camera focusing and zooming control system based on FPGA, to overcome the problem of using single-chip microcomputer as the design idea of ​​controlling camera focusing and zooming core chip in the existing photoelectric detection technology to make the single-chip microcomputer work Busy, poor real-time performance, easy to cause equipment damage

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