An analog signal acquisition circuit, method and device

Abstract

The application discloses an analog signal acquisition circuit, comprising: an amplifying circuit for receiving and amplifying the analog signal; an AD converter connected to the output end of the amplifying circuit; a controller connected to the output end of the AD converter , for judging whether the ratio of the size change range of the digital signal to the total range of the AD converter is lower than the preset ratio, if so, then determine the update value of the amplification ratio of the amplification circuit whose ratio is not lower than the preset ratio, and determine the amplification The parameter update value of the components in the circuit sends a corresponding adjustment signal to the adjustment circuit; the adjustment circuit connected to the output terminal of the controller is used to adjust the parameters of the components in the amplification circuit so that the amplification ratio becomes the amplification ratio update value . The application effectively improves the signal-to-noise ratio of the infrared signal. The present application also discloses a method, device and computer-readable storage medium for collecting analog signals, which also have the above beneficial effects.

Description

technical field [0001] The present application relates to the technical field of signal acquisition, and in particular, to an analog signal acquisition circuit, method, device, and computer-readable storage medium. Background technique [0002] Analog signal acquisition circuits have been widely used in the field of electronic technology, especially in infrared imaging technology. [0003] In the process of infrared imaging, the infrared rays emitted from infinity pass through the optical system and are imaged on the photosensitive element on the focal plane of the focal plane detector. The focal plane detector converts the received optical signal into an electrical signal and processes and transmits it. Finally, it is sent to the monitoring system to form an image. Among them, the focal plane detector generally outputs analog signals, so its analog signals need to be amplified and AD converted into digital signals. [0004] However, since infrared images use the principle...

AI Technical Summary

Problems solved by technology

[0004] However, since infrared images use the principle of thermal radiation imaging and are mostly used in night vision outdoor scenes, the temperature difference between the imaging target and the environmental background in night vision scenes is relatively small, making infrared images have lower signal quality than visible light images. Noise ratio and contrast, the histogram distribution is relatively concentrated, the uniformity is poor, and sometimes some environmental backgrounds become the gray level corresponding to the main peak in the histogram, the difference in picture effect can be imagined

Images