A Method for Measuring Fluid Pressure Using Magnetic Tape

This paper has described a new method for measuring fluid pressure by using a magnetic tape. The fundamental ideas of this method are as follows; the magnetic tape is magnetized by a magnetic field and the magnetization quantity of the tape is related to the strength of the magnetic field. Therefore, when the diaphragm made of the magnetic tape is placed in a magnetic field and is deflected by a pressure, the magnetization quantity of the magnetic tape is changed according to the deflection. This means the magnetization quanlity of the tape relates to the pressure value. Therefore, the pressure value is obtainable by reading the magnetization quantity. A pressure transducer is made for trial by applying this principle. Measurements of fluid pressure around a circular cylinder were carried out by using the pressure transducer. The experimental results showed that the present method was useful for measuring fluid pressure. As an application of this method, a measurement of pressure distribution on the surface of a plate placed perpendicularly to a jet was performed successfully