METHOD OF AND APPARATUS FOR DETECTING THE DISPLACEMENT OF A TARGET

摘要

PCT No. PCT/GB93/01056 Sec. 371 Date Nov. 22, 1994 Sec. 102(e) Date Nov. 22, 1994 PCT Filed May 21, 1993 PCT Pub. No. WO93/24847 PCT Pub. Date Dec. 9, 1993A method of detecting the displacement of a target in a given environment includes storing reference data having data representative of the environment; transmitting a transmit signal towards the target; sensing the return signals from the target and the environment; and detecting the displacement of the target by comparing the return signals and the stored reference data. A method of detecting the level of a sample in a container is also disclosed. Analogous apparatus features are also disclosed.