| 摘要 |
PURPOSE:To form a transmission path between a detecting portion and a converting portion into a single system being a flow signal transmission path, by transmitting a flow signal, which is overlapped with a synchronous signal serving as a trigger, from the detecting portion to the converting portion. CONSTITUTION:An exciting power source oscillating part 14 in a detecting part 10 is controlled by a timing signal generating part 16, and generates an exciting signal such as rectangular wave whose polarity reverses at intervals of a given time. In an overlapping part 17, the exciting signal is overlapped with a synchronous signal, and with a coil 2 excited, a flow signal is fetched from electrodes 13a and 13b of a conduit 11. The flow signal is transferred to a converting part 20 through a transmission path 30, and a converting flow signal, synchronizing with the detecting part 10 and being sampled, is outputted through a sampling gate 23 controlled by means of a sampling signal, a trigger of which an overlapping synchronous signal from a sampling signal generating part 22 serves as. As a result, a transmission path 30 between the detecting part 10 and the converting part 20 can be formed into a single system being a transmission path of a flow signal from the detecting part 10, and the converting part can be installed at a remote place without a trouble. |
