Method and apparatus for measuring the height of filling material on a surface, such as within a container

摘要: A method of measuring a filling level in container or the height loose material over storage surface, comprises transmitting and recording sound pulse having duration at least as long which travels to lowermost material, echo from actual level, measuring, measure time interval between end transmitted pulse. device for on an electroacoustic transducer excited by electric generator receiving whose output is connected electrical device. The are mounted surface being added thereon control circuit adjusted so that it starts stops