Thermochromic optical fiber temperature sensor and sensing method thereof

Abstract

The invention relates to a thermochromic optical fiber temperature sensor and a sensing method thereof. The sensor comprises a light source, incident optical fiber, a thermochromic probe, a heat transfer head, an emergent optical fiber, a fiber spectrometer and a computer. Thermochromic material is distributed at one end of the heat transfer head. The incident optical fiber and the emergent optical fiber are disposed at one end of the thermochromic probe. The heat transfer head is disposed on the inner side of the other end of the thermochromic probe. One thermochromic material end of the heat transfer head is opposite to the incident optical fiber and the emergent optical fiber. The other non-thermochromic-material end of the heat transfer head is connected with an object to be measured. The light source is connected with the incident optical fiber. The fiber spectrometer and the computer are connected with the emergent optical fiber. The thermochromic optical fiber temperature sensor is capable of monitoring temperature accurately. The sensing method enables equipment with the optical fiber temperature sensor to be simple and cost to be lower. The method and device are normally operable in areas with severe environments, such as electric field and high corrosion areas.

Description

technical field [0001] The invention belongs to the field of optical sensors, in particular to a thermochromic optical fiber temperature sensor and a sensing method thereof. Background technique [0002] The power system is the guarantee for industrial and agricultural production and the development of the national economy. In order to alleviate the power shortage, the power system is developing in the direction of ultra-high voltage, large-capacity AC transmission and high-voltage direct current transmission. Due to the high voltage and high current of various contacts and connection points of electrical equipment in power plants and substations, under heavy loads, the high heat of the contact points may cause equipment burnout and power outages. Therefore, the online monitoring and control of the temperature of various connection points in the high-voltage live transmission network is an important content to ensure the safe operation of the power grid. [0003] For a long...

AI Technical Summary

Problems solved by technology

[0003] For a long time, it has been difficult to monitor the temperature of the contacts of the switch cabinet in real time. This is because the space of the switch cabinet is limited, but there are many components in the cabinet, and most of the high-voltage live components are exposed, so the conventional temperature measurement method cannot be used.

Ordinary temperature monitoring methods are mainly realized by temperature sensing elements such as thermocouples, thermal resistors, and semiconductor temperature sensors. This method either has metal in the sensor itself, and the function of the sensor fails in a strong magnetic field environment; or requires metal wires to transmit signal, in a compact switchgear, it is very difficult to achieve reliable insulation of the system

Images