Study on Measurement and Alarm Device with Magnetic Fluid for Air Flow Safety

For many engineering fields, the air flow should be controlled into a safety range to ensure the production safely. A novel flow measurement device was designed for large safety range. A separable structure of the device was proposed to meet the convenience to carry. Magnet and magnetic fluid was selected as an inducting core. The characteristics of the inducting core were researched. The working principle of the measurement and alarm device for air flow safety was introduced and analyzed. The separable structure was designed to achieve two modes of the measuring and alarm device that one mode is for measuring and alarming work and the other mode is for storing and transporting conveniently. A pipe was designed for the air to pass through. Two coils were designed and chosen to be set up at two ends of the pipe to detect the changes of the internal magnetic flux and then alarm for the changes. An adjustment element was designed and set into the pipe to adjust the position of the inducting core to satisfy the requirements of the working conditions. The designed device is feasible to keep the air flow safely and to alarm when the air flow exceeds safety range.