The Design And Application Study Of Fiber Drop Sensor

The optical fiber drop sensor is a type of the liquid-testing sensors based on the relationship between the dripping process and the characters of the liquid to be tested. It is potentially useful testing systems of physical and chemical characters of liquid samples by analyzing the variety of the light intensity, termed as the fingerprint drop trace, shortly FDT. The drop volume testing is based on the changing capacitive with the drop descending.On the basis of the principle of fiber drop sensor the work design the concrete structure, the route of light, circuit and then established the fiber drop sensor. Then a series of experiments are processed to obtain the FDTS of different liquid samples, especially alcohol solutions of different concentrations and cane sugar solutions of different concentrations. After discussing the traditional parameters of FDT, a new character is given to mark the index of refraction and concentration of the alcohol solutions and cane sugar solutions. The method also can be used in testing the surface tension of alcohol.