Sub-millimetre wave range-Doppler radar as a diagnostic tool for gas-solids systems -- solids concentration measurements

The Vacancy Concentration and Diffusion in Rare Gas Solids H

Using the two-body Mie, Lennard-Jones potentials derived from solid state properties, the vacancy concentration p. and self-diffusion coefficient D are calculated for the rare gas solids. The results are summarised in Tables l-3. Agreement is obtained with the observed D but not with p.. If the usual interpretation is applied, the agreement of I) suggests the absence of many-body forces whereas...

Internal stress wave measurements in solids subjected to lithotripter pulses.

Semiconductor strain gauges were used to measure the internal strain along the axes of spherical and disk plaster specimens when subjected to lithotripter shock pulses. The pulses were produced by one of two lithotripters. The first source generates spherically diverging shock waves of peak pressure approximately 1 MPa at the surface of the specimen. For this source, the incident and first refl...

Wave Propagation in Mixture of Generalized Thermoelastic Solids Half-Space

This paper concentrates on the reflection of plane waves in the mixture of generalized thermo elastic solid half-space. There exists quasi dilatational waves i.e. qP1, qP2, qT and two rotational waves S1, S2 in a two dimensional model of the solid. The boundary conditions are solved to obtain a system of five non-homogeneous equations for amplitude ratios. These amplitude ratios are found to de...

Comparison of Scanning Laser Range-finders and Millimetre-wave Radar for Creating a Digital Terrain Map

A Millimetre Wave Radar Sensor for Autonomous Navigation and Landing

Vehicles, houses, small buildings 2-3m but in the longer term, residual errors and biases integrate up into unacceptably large position errors. Under these conditions, millimetre wave radar can be applied in a number of ways to improve the navigation accuracy. It can be used as a Doppler sensor to improve the velocity estimation accuracy by measuring the ground speed, or it can be used to produ...