Measurement of density and wetness in snow using time-domain reflectometry
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چکیده
منابع مشابه
Investigation of the Effect Soil particles size on the Currency Time Domain Reflectometry for water content measurement
This study carried out on the provided textures at laboratory. The provided textures were infusedinside the PVC cylinder with 30cm height and 25cm diameter. The studied textures were loamysand, sandy loam, sandy clay-loam, clay loam and clay. After 24 hours of saturation, the soil watercontent of the samples was measured by oven-dry gravimetric and TDR methods. For each texturesat any stage of ...
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This chapter represents the state of the art at the time of release. Readers are encouraged to consult the link below for the version of this chapter with the most recent release date:
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Based on the principle of time domain reflectometry(TDR) cable length measurement, the principle error of the TDR cable length measurement is analyzed. Methods for reducing cable length measurement error are analyzed. Two cable length measurement systems based on the TDR principle are designed. The high-precision time interval measurement module is the core of the first measurement system. The ...
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We propose and experimentally demonstrate real-time locating and speed measurement of fibre fuse by analysing the Doppler shift of reflected light using optical frequency-domain reflectometry (OFDR). Our method can detect the start of a fibre fuse within 200 ms which is equivalent to a propagation distance of about 10 cm in standard single-mode fibre. We successfully measured instantaneous spee...
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TTA especially with the filtering of higher frequencies in cables longer than 3.2 m resulting in increased signal Water content and electrical conductivity of soils are routinely rise time (Heimovaara, 1993; Noborio, 2001). Timing or determined using time-domain reflectometry (TDR) based on analysis length measurement errors associated with finite pixel of signal travel time and attenuation alo...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 1998
ISSN: 0260-3055,1727-5644
DOI: 10.1017/s0260305500014580