A global pressure acquisition system for a rotating model, comprising a CCD camera, a signal generator, a stroboscopic pulse LED light source, a photoelectric sensor, a preset counter, and a controller, wherein the global pressure acquisition system is configured such that:
- PSP is sprayed in a measured area of the rotating model, and a reflective patch is pasted in a non-measured area of the rotating model rotating at the same speed;
- the photoelectric sensor is disposed to face the rotating model and is connected to an input end of the signal generator;
- when the rotating model rotates to any to-be-measured phase, a light spot emitted by the photoelectric sensor is irradiated on the reflective patch, and is received by the photoelectric sensor after being reflected, and a signal is sent to trigger a channel A and a channel B of the signal generator to send signals;
- the CCD camera carries a lens, the lens is aligned with the rotating model and is capable of shooting a complete image of the rotating model, and a bandpass filter only allowing a light emitting waveband of the PSP to pass through is mounted in front of the lens to prevent ambient light and light emitted by the light source from entering a photosensitive chip of the CCD camera;
- the CCD camera is connected to a computer by a data connecting line, and the computer is used for controlling an exposure time of the CCD camera;
- after being acquired by the CCD camera, a light emitting signal of the PSP is photoelectrically converted and is sent to the computer by the data line to form a PSP image;
- and an external triggering interface of the CCD camera is connected to the channel A of the signal generator, the signal generator sends a signal to the CCD camera via the channel A to control initial exposure time of the CCD camera, and the exposure time of the CCD camera is controlled by the computer;
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- the stroboscopic pulse LED light source is disposed to face the rotating model, and light emitted by the stroboscopic pulse LED light source is capable of covering a to-be-measured area;
- the stroboscopic pulse LED light source is connected to one end of a relay switch of the preset counter, and the other end of the relay switch of the preset counter is connected to the channel B of the signal generator;
- and the channel B of the signal generator sends a signal to control a single pulsed light emitting time and a light emitting frequency of the stroboscopic pulse LED light source.