This equipment is used for flow field testing and research in building environmental simulation experiments. Measurement dimensions include planar U and V velocities. Measured media include air flow, water flow, and two-phase flow. Velocity measurement range is 0–100 m/s. Measurement area is no less than 500 mm × 500 mm. Key hardware and software specifications: (1) Laser (1 set): Output energy ≥200 mJ/pulse; pulse frequency 15 Hz; wavelength 532 nm; energy stability ≤2%; excellent electromagnetic compatibility; jitter ≤±0.5 ns. (2) Optical arm (1 set): 7-joint, 1.8m length; 360-degree rotation capability; includes mounting base; factory-produced; transmission loss <10%. (3) Synchronizer (1 set): Time resolution 0.25ns; delay 0-1000s; pulse width 10ns-1000s; jitter <400ps; provides other external devices. (4) CCD Camera (1 set): 6M resolution (2756 x 2208 pixels); frame rate 20 fps; minimum interframe time <200ns; QE ≥55%@590nm; 50mm/F1.8 lens; includes CCD circuit protection array, all camera cables, and 64-bit image acquisition card. (5) Image acquisition and data analysis system (2DPIV software processing module): Real-time display of image data and online visualization of vector fields; Supports Hart processing, ultra-fine velocity field refinement, and multiphase flow processing (with particle size measurement capability); High-speed PIV analysis module enabling velocity region definition for specified models and correlation analysis of non-sequential frames; Vortex core tracking; Specialized data processing module: Provides direct cross-correlation and cross-correlation algorithms, plus Hart advanced PIV correlation algorithms; offers Gaussian and ZeroPad diagnostic correction algorithms to enhance signal-to-noise ratio; includes particle tracking velocity measurement SR-PIV analysis module: Capable of independently tracking discrete phase motion, calculating discrete phase particle size, and separately computing velocity fields for discrete and continuous phases. (6) Sheet Light Source Lens Assembly (1 set): Adjustable focal length; waist position 1 meter from exit; minimum expanded area 100mm × 100mm; sheet light thickness 1mm. (7) PIV Tracer Particles (5 sets): Hollow glass spheres, 8–12μm particle size, 1L container.