A Realization Method of Frame Synchronization Applied in Hardware-in-the-loop Simulation Experiment

Abstract

A method for implementing frame synchronization in hardware-in-the-loop simulation experiments. The invention belongs to the technical field of semi-physical simulation experiments. Its method step one: lead out the frame synchronization signal of the video signal processing chip in the target simulator, the target simulator circuit power +Vpp and the target simulator circuit ground; two: pass the frame synchronization signal of the video signal processing chip through Resistor R1 is input to the inverting input terminal of the operational amplifier A1, and the frame synchronization signal is input to the positive terminal of the light-emitting diode in the optocoupler A2 through the resistor R1 and the resistor Rf, and the emitter of the phototransistor in the optocoupler A2 passes through the resistor R3 is grounded; Three: Input the trigger signal output from the emitter end of the phototransistor in the optocoupler A2 into the exposure and photographing trigger input end of the CCD camera. The present invention can effectively complete the problem of frame synchronization in the simulation experiment, so that the target simulator and the target receiving device can achieve accurate frame synchronization effect, so that the simulation experiment can be carried out smoothly.

Description

technical field [0001] The invention belongs to the technical field of semi-physical simulation experiments. Background technique [0002] In the hardware-in-the-loop simulation experiment, it usually consists of the following parts, which are used to generate the visual simulator of the image signal source. The image signal source is usually transmitted to the target simulator through HDMI, VGA, DVI and other interfaces. The target simulator’s The circuit control system will have a corresponding chip to process the obtained image signal, and then the target simulator will emit the image as parallel light through the collimating optical system and project it to infinity. In hardware-in-the-loop simulation experiments, there is also a method for processing image signals. First, generate the pictures required in the simulation experiment in the visual simulator, and then store these pictures in the memory of the target simulator. If the number of pictures is huge, you need to...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for implementing frame synchronization in hardware-in-the-loop simulation experiments, in order to solve the problem that it is difficult to achieve precise synchronization of each frame of pictures in the high-precision simulation experiments during the projection of the target simulator and the aerial camera photographing process the problem

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