Range gating based laser imaging synchronous control system

Abstract

The invention discloses a range gating based laser imaging synchronous control system. The system comprises a computer software interface, a USB interface, a micro controller, an FPGA (field programmable gate array), a peripheral circuit, a time delay fine tuning circuit, a PCB (printed circuit board) and an operational amplifier, wherein the data sent out from the computer software interface aretransmitted to the micro controller by virtue of the USB interface; the micro controller transmits the frequencies, pulse width parameters of triggering signals of a pulse laser and an ICCD (intensified charge coupled device) and control parameters of delays and mutual delay of the two triggering signals to the FPGA; the FPGA generates two TTL (transistor-transistor logic) signals which are used for triggering the pulse laser and the ICCD and are adjustable (coarse tuning) in frequency, pulse width, delay and interactive delay after receiving the control parameters, the two signals are used for realizing fine tuning on the delays and the interactive delay by virtue of the time delay fine tuning circuit, and finally the pulse laser and the ICCD are triggered. By applying the system in the invention, the aim of flexibly setting imaging parameters can be achieved; and meanwhile, the structure is compact, and the system is convenient to carry and use and has good stability.

Description

technical field [0001] The present invention relates to the technical field of laser imaging based on range gating, in particular to a synchronous control system for laser imaging based on range gating, which is suitable for controlling the frequency and pulse width of each trigger signal of a pulse laser and an ICCD when laser imaging is based on range gating parameters, as well as the control parameters of the delay and mutual delay of the two trigger signals, the control parameters of the output power of the pulse laser, the gain control parameters of the ICCD, etc. Real-time automatic delay and mutual delay (convenient for delay compensation) and ICCD trigger signal in control occasions with adjustable delay steps. Background technique [0002] At present, the range-gated laser imaging technology is widely used in surveillance, reconnaissance and security fields. It is mainly through the timing control between the pulsed laser and the imaging detector, according to the t...

AI Technical Summary

Problems solved by technology

At present, most of the synchronous control systems based on range-gated laser imaging technology can only perform some simple settings for these parameters, which is poor in flexibility, difficult to guarantee stability, and cannot be set in real time, so it is more troublesome to use and has a greater impact on the effect of gated imaging. big impact

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