测量时间 | 0-无穷大 | 分辨率 | + /- 0.5 微米 |
测量范围 | 0.5-4000微米 | 重现性 | <1% |
分散方式 | 干湿法分散 | 仪器种类 | 激光相位多普勒 |
The PDI Flight Probe has been developed specifically for aircraft-based cloud
studies
that require the measurement of liquid droplet size distribution, velocity
distribution,number density, and liquid water
content (LWC). The probe incorporates the well-established phase Doppler technique for directly measuring the size
and velocity of individual droplets in the
cloud. The measurement method is sensitive only to spherical
particles and therefore non-spherical ice
crystals are rejected. Furthermore, the probe has the ability to differentiate between liquid droplets and
droplets that are frozen. The PDI Flight
Probe overcomes the inherent problems, such as depth-of-focus,
measurement uncertainty, and coincidence
errors in high number density environments, faced by older and obsolete measurement technologies which are based on
forward light scattering.
The PDI Flight Probe offers turnkey operation with a fully automated setup
feature. The flight probe system can be used for
the real-time, non-intrusive measurement of individual droplet size and single velocity component in a variety
of flight and wind-tunnel applications.
The complete instrument includes the flight probe (including the optical
transmitter and receiver), ASA signal processor, and the AIMS system
software. The diode-pumped solid state (DPSS)
laser used in the probe provides stability, compactness,ruggedness, and high reliability; it eliminates the need
for inefficient and unreliable fiber optics. The PDI-FPDR system has optional built-in
heaters to prevent ice accretion. This allows the flight probe to be used under extreme icing
environments without any signal loss.
This probe was developed with funding support from the U.S. Navy, U.S. Army,
and
NASA Glenn Research Center.
Artium PDI-FP 双量程可机载飞行探头,PDI-FPDR
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