Multi-channel analog data real-time acquisition system

Abstract

The invention discloses a multi-channel analog data real-time acquisition system which comprises an infrared focal plane, an AD conversion module, an FPGA and a storage module. A multipath output port of the infrared focal plane is connected with a multipath input port of the AD conversion module, a multipath output port of the AD conversion module is connected with a multipath input port of the FPGA, multipath analog signals of the infrared focal plane are input to the AD conversion module, the AD conversion module converts the multipath analog signals into multipath digital signals according to an acquisition clock sent by the FPGA, and send the multipath digital signal to FPGA;and the FPGA determines an effective signal of each path of digital signal according to the phase of the acquisition clock and a delay parameter corresponding to each path of analog signal, and stores the effective signals in the storage module. According to the invention, simultaneous acquisition of multiple analog channels in one clock period is realized, the situation that invalid data are acquired by individual channels is avoided, and the problem of acquisition clock synchronization is solved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of infrared acquisition, and in particular to a real-time acquisition system for multi-channel analog data. Background technique [0002] The existing infrared focal plane data processing scheme is to adjust the phase of the AD acquisition clock to locate the effective data acquisition point in dealing with the synchronization of the AD acquisition clock. In theory, this method can only be used in one clock cycle (0 degrees to 360 degrees) to adjust. However, in practical applications, the delay may exceed one clock cycle, especially when the multi-channel analog data is collected simultaneously, and the input delay of each channel is not the same, if Simply adjusting the clock phase to align data requires relatively high requirements for related peripheral devices, and it is also difficult to debug. Contents of the invention [0003] An embodiment of the present invention provi...

AI Technical Summary

Problems solved by technology

However, in practical applications, the delay may exceed one clock cycle, especially when the multi-channel analog data is collected simultaneously, and the input delay of each channel is not the same, if Simply adjusting the clock phase to align data requires relatively high requirements for related peripheral equipment, and it is also difficult to debug.

Images