Daniel Aquilino González Fernández

Error estimation in a fiber-optic dual waveband ratio pyrometer

Noncontact sensor systems are able to measure high temperature work in very harsh environments, so they need the cooling system to work properly or they take measurements from long distances, introducing hazardous components in the measurement. In order to avoid the aforementioned problems, the hot-point optical radiation is captured by the all passive fiber transducer from a short distance, transmitted through the optical channel, and, hence, it is processed on the optoelectronic unit. Then, later, in order to be cost effective, we use a sandwich-type detector, which discriminates the light in two different optical widebands. Relative error less 4% is obtained from a study of the error estimation in order to evaluate its influence on the optical channel condition, and connection losses, among others, can modify the input light at optoelectronic units on the sensor system performances.

High-temperature optical fiber transducer for a smart structure on iron-steel production industry

The quality of the steel, among others, depends on the temperature profile during the last cooling process. Because of that, the capability of real-time temperature measurements at several points of the steel bars during the aforementioned production process is highly desirable in order to build a smart structure. To measure temperatures in the range of 800 - 1300 degrees centigrade, the sensor system proposed, is doted of new fiber optic transducers. They are based on the measurement of the optical radiation generated by the hot steel bars through a geometric cavity which is properly designed and fabricated to maximize its accuracy.