Apparatus for sonic measurement of the physical conditions of a liquid and method of analysing a sudden sine pulse emitted by the latter

摘要

The present invention relates to an apparatus for sonic measurement of the physical conditions of a liquid and a method of analysing a sudden sine pulse, in which a multi- level probe for sonic range measurements utilizes a plurality of parallel reflectors that each include an opening arranged coaxially about a beam of ultrasonic energy transmitted along a reference axis from an associated transducer. The opening in each reflector permits most of the sonic energy to pass to a subsequent reflective surface, while the periphery about the opening provides echo signals for determining physical conditions in the environment through which the sonic energy has passed. A system is used for determining physical conditions that are a function of time differences between signals from different reflectors, calculated with a highly efficient digital signal processing algorithm. The present invention is usable, for example, in the measurement of physical conditions inside an underground liquid storage tank. IMAGE