Optical fibre used to create pyrometer
Optical fibre is normally used to transmit information, but a group of researchers at the Universidad Carlos III de Madrid (UC3M) has developed a technique that makes it possible to use optic fibre as a thermometer in extreme industrial environments.
The system can measure the temperature of mechanical or cutting processes in areas where conventional techniques – including thermographic cameras and thermocouples – do not have access.
The pyrometer measures radiation in two colours and calculates the temperature based on the quotient of the two signals. This system is calibrated, says the team, so that it can 'start to measure at 300°'. "It could go up to 1000° because the fibre, which is made of silica, can withstand very high temperatures," said Professor Carmen Vázquez from UC3M's Department of Electronic Technology.
The system is said to have application where mechanised tools are used for manufacturing, including the aerospace sector, but it may also have applications in the biomedical field.
