Rupp, J.J.RuppSchmidt, F.F.SchmidtBarth, M.M.Barth2022-03-082022-03-081999https://publica.fraunhofer.de/handle/publica/304461DE 19815199 A UPAB: 19991124 NOVELTY - The flow meter has first and second sensors (6,8) alternately operated as a transmitter and receiver, whereby the preferred digitized receiver signals are correlated with each other in an evaluation computer (30) according to the transition time correlation. A programmable transmission generator (34) is used to generate different stimulation functions, especially using code-bit control. USE - For measuring flow rate and volumetric flow. ADVANTAGE - Developed to enable accurate transition time measurement even for media with high scattering components and to achieve increased accuracy at low cost.de608610620patent1998-19815199