The design of a vortex flow-meter with anti-vibration structure

摘要

Work principle of the vortex flow-meter is based on the corresponding relationship between fluid vibration frequency and flow velocity. It measures the flow velocity of fluid by measuring the frequency of sensor output signal. In the development of vortex flow-meter, the aspects of vibration, electromagnetic interference and the lower limit of measurement are the major problems that hinder the development and application of vortex flow-meter. In this paper, an unique design method based on the paste position of signal detection probes and voltage components is proposed. It uses physical design to counteract the change of electric charge which is caused by vibration noise in order to detect the real change of electric charge completely generated by fluid. The new design method is proposed from the point of view of theory and practice. The proposed method is able to solve the problem of vibration noise effectively and improve signal noise ratio of vortex flow signal.