CN105005212A - Frame synchronous implementation method applied to semi-physical simulation experiment - Google Patents
Frame synchronous implementation method applied to semi-physical simulation experiment Download PDFInfo
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- CN105005212A CN105005212A CN201510540537.1A CN201510540537A CN105005212A CN 105005212 A CN105005212 A CN 105005212A CN 201510540537 A CN201510540537 A CN 201510540537A CN 105005212 A CN105005212 A CN 105005212A
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Abstract
The invention discloses a frame synchronous implementation method applied to a semi-physical simulation experiment, and belongs to the technical field of the semi-physical simulation experiment. The method includes steps 1: jumping wire and leading out frame synchronous signals of a video signal processing chip in a target simulator, a circuit power supply + Vpp of the target simulator and a circuit ground of the target simulator; 2: inputting the frame synchronous signals of the video signal processing chip into a reverse direction input end of an operational amplifier A1 through a resistor R1, simultaneously inputting the frame synchronous signals into an anode end of a light emitting diode in an optical coupler A2 through the resistor R1 and a resistor Rf, and grounding an emitter electrode of a photosensitive triode in the optical coupler A2 through a resistor R3; and 3: inputting trigger signals output by an emitting electrode end of the photosensitive triode in the optical coupler A2 into an exposure shooting trigger input end of a Charge Coupled Device (CCD) camera. The frame synchronous implementation method applied to the semi-physical simulation experiment can effectively solve the problem of the frame synchronization in the semi-physical simulation experiment, enables the target simulator and a target receiving device to achieve the accurate frame synchronization effect, and enables the simulation experiment to be smoothly carried out.
Description
Technical field
The invention belongs to the technical field of hardware-in-the-loop simulation experiment.
Background technology
In hardware-in-the-loop simulation experiment, usually be made up of following components, for the vision simulation machine of synthetic image signal source, image signal source passes through HDMI usually, the interfaces such as VGA, DVI are transferred in target simulator, and the circuit control system of target simulator has corresponding chip and processes the picture signal obtained, then target simulator by image by collimating optical system with parallel light emergence, project infinite distance.In hardware-in-the-loop simulation experiment, also there is the method for process picture signal.First in vision simulation machine, generate picture required in emulation experiment, then by these picture-storage in the internal memory of target simulator, if picture number is huge, then need for target simulator configures jumbo hard disk, by picture-storage in the hard disk of target simulator, if simulate static target, target simulator is directly utilized to project to it.If emulation dynamic object, refreshing frame frequency is set in target simulator, every frame picture is projected.
In hardware-in-the-loop simulation experiment, simulation objectives projects through target simulator, shines infinite distance.For aerial camera ground testing system, aerial camera will be taken simulation objectives.
If desired reach the emulation of superhigh precision, then need aerial camera to take each two field picture that target simulator projects.Namely correspond to each two field picture of target simulator projection, aerial camera all will carry out single exposure to it and take pictures.How taking pictures in the projection of target simulator and the exposure of aerial camera and reach frame synchronization, is technological difficulties.
Summary of the invention
The object of this invention is to provide and be a kind ofly applied to the implementation method of frame synchronization in hardware-in-the-loop simulation experiment, be difficult in projection in order to solve target simulator in High Precision Simulation experiment and aerial camera photographing process to reach every frame picture all reach precise synchronization problem.
Described object is realized by following scheme: described a kind of implementation method being applied to frame synchronization in hardware-in-the-loop simulation experiment, and its method step is:
Step one: by all fly line extractions of the frame synchronizing signal of video frequency signal processing chip in target simulator, target simulator circuit power+Vpp and target simulator circuit ground;
Step 2: the frame synchronizing signal of video frequency signal processing chip is input to by resistance R1 in the reverse input end of operational amplifier A 1, frame synchronizing signal is input in the positive terminal of the light emitting diode in optocoupler A2 by resistance R1, resistance Rf simultaneously, and the positive input of operational amplifier A 1 connects target simulator circuit ground by resistance R2; The negative pole end of the light emitting diode in the output termination optocoupler A2 of operational amplifier A 1, the collector of the phototriode in optocoupler A2 meets target simulator circuit power+Vpp and holds, and the emitter of the phototriode in optocoupler A2 is by resistance R3 ground connection;
Step 3: the exposure that the trigger pip that the emitter terminal of the phototriode in optocoupler A2 exports is input to CCD camera is taken pictures in trigger input; Make the exposure of CCD camera take pictures trigger input time the real chip receiving video frequency signal processing in the target simulator frame synchronizing signal that exports.
The present invention effectively can complete a difficult problem for frame synchronization in emulation experiment, target simulator and intended recipient device is made to reach accurate frame synchronizing effect, effectively improve simulation accuracy, decrease the space of building emulation link, unnecessary frame alignment device can be reduced simultaneously, emulation experiment can be carried out smoothly.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram related in the inventive method.
Embodiment
Embodiment one: shown in composition graphs 1, illustrates the technical scheme of present embodiment, and its method step is:
Step one: by all fly line extractions of the frame synchronizing signal of video frequency signal processing chip in target simulator, target simulator circuit power+Vpp and target simulator circuit ground;
Step 2: the frame synchronizing signal of video frequency signal processing chip is input to by resistance R1 in the reverse input end of operational amplifier A 1, frame synchronizing signal is input in the positive terminal of the light emitting diode in optocoupler A2 by resistance R1, resistance Rf simultaneously, and the positive input of operational amplifier A 1 connects target simulator circuit ground by resistance R2; The negative pole end of the light emitting diode in the output termination optocoupler A2 of operational amplifier A 1, the collector of the phototriode in optocoupler A2 meets target simulator circuit power+Vpp and holds, and the emitter of the phototriode in optocoupler A2 is by resistance R3 ground connection;
Step 3: the exposure that the trigger pip that the emitter terminal of the phototriode in optocoupler A2 exports is input to CCD camera is taken pictures in trigger input; Make the exposure of CCD camera take pictures trigger input time the real chip receiving video frequency signal processing in the target simulator frame synchronizing signal that exports.
The model of the video frequency signal processing chip related in the technical program is TFP401; The model of operational amplifier is uA741; The model of optocoupler is 6N137.
Principle of work: the frame synchronizing signal of video frequency signal processing chip is with the rate-adaptive pacemaker of 100hz; The in-phase input end mouth ground connection of operational amplifier A 1, forms a direction input amplifying circuit.The light emitting diode of optocoupler A2 has accessed in reverse branch road., teasel root short according to void:
i
F＝i
i＝u
i/R
1；
Illustrate that electric current is only relevant with voltage U i, and be linear relation between them.Only need the size by conservative control R1, optocoupler A2 just can be made to be in linear stage.Meanwhile, transistor collector adds reversed bias voltage, and making it can normally in linear regional work.Just analog signal isolating transmission can be realized.The very good control of amplification coefficient of circuit, for:
In this circuit, important device is 6N137 photo-coupler.The advantage of photo-coupler is signal one-way transmission, and input end and output terminal fully achieve electrical isolation, output signal on input end without impact, and antijamming capability is strong, and working stability, contactless, long service life, transfer efficiency is high.But there is nonlinear area in the input circuit of photo-coupler composition, light emitting diode exists dead zone voltage, and comparatively large by the impact of temperature, cause input, output relation drift, time therefore analog signal isolating made by photo-coupler, there is larger problem.We, when the process of use photo-coupler, signal transmission, need to ensure that photo-coupler is operated within its range of linearity, meet the requirement to simulating signal.
Claims (1)
1. be applied to an implementation method for frame synchronization in hardware-in-the-loop simulation experiment, it is characterized in that its method step is:
Step one: by all fly line extractions of the frame synchronizing signal of video frequency signal processing chip in target simulator, target simulator circuit power+Vpp and target simulator circuit ground;
Step 2: the frame synchronizing signal of video frequency signal processing chip is input to by resistance R1 in the reverse input end of operational amplifier A 1, frame synchronizing signal is input in the positive terminal of the light emitting diode in optocoupler A2 by resistance R1, resistance Rf simultaneously, and the positive input of operational amplifier A 1 connects target simulator circuit ground by resistance R2; The negative pole end of the light emitting diode in the output termination optocoupler A2 of operational amplifier A 1, the collector of the phototriode in optocoupler A2 meets target simulator circuit power+Vpp and holds, and the emitter of the phototriode in optocoupler A2 is by resistance R3 ground connection;
Step 3: the exposure that the trigger pip that the emitter terminal of the phototriode in optocoupler A2 exports is input to CCD camera is taken pictures in trigger input; Make the exposure of CCD camera take pictures trigger input time the real chip receiving video frequency signal processing in the target simulator frame synchronizing signal that exports.
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| CN201510540537.1A CN105005212B (en) | 2015-08-28 | 2015-08-28 | The implementation method of frame synchronization in a kind of experiment applied to HWIL simulation |
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| CN201510540537.1A CN105005212B (en) | 2015-08-28 | 2015-08-28 | The implementation method of frame synchronization in a kind of experiment applied to HWIL simulation |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259980A (en) * | 2013-05-22 | 2013-08-21 | 北京工业大学 | TDI CCD output signal preprocessor |
| CN103505174A (en) * | 2012-06-20 | 2014-01-15 | 富士胶片株式会社 | Light source apparatus and endoscope system |
| CN203606637U (en) * | 2013-11-21 | 2014-05-21 | 国家电网公司 | Simulation circuit and system which are used for power system |
| CN104390703A (en) * | 2012-10-11 | 2015-03-04 | Vtt科技研究中心 | Method for determining calibration parameters for a spectrometer |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103505174A (en) * | 2012-06-20 | 2014-01-15 | 富士胶片株式会社 | Light source apparatus and endoscope system |
| CN104390703A (en) * | 2012-10-11 | 2015-03-04 | Vtt科技研究中心 | Method for determining calibration parameters for a spectrometer |
| CN103259980A (en) * | 2013-05-22 | 2013-08-21 | 北京工业大学 | TDI CCD output signal preprocessor |
| CN203606637U (en) * | 2013-11-21 | 2014-05-21 | 国家电网公司 | Simulation circuit and system which are used for power system |
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