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Currently, the IR cameras are broadly used in the optic-electronic tracking,
optic-electronic measuring, fire control and optic-electronic countermeasure field, but the output
sequence of the most presently applied IR cameras in the project is complex and the giving
sequence documents from the leave factory are not detailed. Aiming at the requirement that the
continuous image transmission and image procession system need the detailed sequence of the IR
cameras, the sequence measurement system of the IR camera is designed, and the detailed
sequence measurement way of the applied IR camera is carried out. The FPGA programming
combined with the SignalTap online observation way has been applied in the sequence
measurement system, and the precise sequence of the IR camera's output signal has been achieved,
the detailed document of the IR camera has been supplied to the continuous image transmission
system, image processing system and etc. The sequence measurement system of the IR camera
includes CameraLink input interface part, LVDS input interface part, FPGA part, CameraLink
output interface part and etc, thereinto the FPGA part is the key composed part in the sequence
measurement system. Both the video signal of the CmaeraLink style and the video signal of LVDS
style can be accepted by the sequence measurement system, and because the image processing
card and image memory card always use the CameraLink interface as its input interface style, the
output signal style of the sequence measurement system has been designed into CameraLink
interface. The sequence measurement system does the IR camera's sequence measurement work
and meanwhile does the interface transmission work to some cameras. Inside the FPGA of the
sequence measurement system, the sequence measurement program, the pixel clock modification,
the SignalTap file configuration and the SignalTap online observation has been integrated to
realize the precise measurement to the IR camera. Te sequence measurement program written by the verilog language combining the SignalTap tool on line observation can count the line numbers
in one frame, pixel numbers in one line and meanwhile account the line offset and row offset of
the image. Aiming at the complex sequence of the IR camera's output signal, the sequence
measurement system of the IR camera accurately measures the sequence of the project applied
camera, supplies the detailed sequence document to the continuous system such as image
processing system and image transmission system and gives out the concrete parameters of the
fval, lval, pixclk, line offset and row offset. The experiment shows that the sequence measurement
system of the IR camera can get the precise sequence measurement result and works stably, laying
foundation for the continuous system.
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