Method for packaging sensitized optical fiber grating temperature sensor

Abstract

The invention discloses a packaging method for a sensitivity enhanced optical fiber grating temperature sensor, belongs to the technical field of sensors, and relates to a sensitivity enhanced packaging method of the optical fiber grating temperature sensor. The method is characterized in that the optical fiber grating is packaged into a metal capillary tube by applying prestress to the optical fiber grating and gluing two ends of the optical fiber grating, and the metal capillary tube packaged with the optical fiber grating is put into an outer stainless steel tube the internal diameter of which is greater than the external diameter of the metal capillary tube, then heat conducting silicone grease is filled between the metal capillary tube and the outer stainless steel tube, and finally the two ends of the outer stainless steel tube are connected with an optical fiber jacket or an optical fiber cable; and a fiber pigtail of the optical fiber grating must be ensured to be in a bent state during the packaging process. The beneficial effects of the packaging method is that the sensitivity enhanced optical fiber grating temperature manufactured by the packaging method has the advantages of high temperature sensitivity, rapid response speed, simple structure, reasonable design, high survival rate of the field installation and the like, and can be used for high-precision temperature measurement in such occasions as intense electromagnetic radiation, flammable and explosive occasions and the like.

Description

technical field [0001] The invention belongs to the technical field of sensors, relates to the manufacture of an optical fiber grating temperature sensor, and relates to a method for packaging the optical fiber grating temperature sensor by using a stainless steel tube and heat-conducting silicone grease. Background technique [0002] Temperature measurement is relatively common. The most commonly used is a mercury thermometer, but the computer cannot automatically record data. Electronic temperature sensors are widely used in various industrial control equipment and electronic instruments. Thermocouples can measure high temperatures, but the measurement accuracy is not high, and cold junction compensation is required; platinum resistors have high measurement accuracy, but low measurement sensitivity , and it is necessary to compensate the connected leads; the thermistor is also commonly used as a temperature measuring element and a temperature control device, with high sen...

AI Technical Summary

Problems solved by technology

The most commonly used is a mercury thermometer, but the computer cannot automatically record data

Electronic temperature sensors are widely used in various industrial control equipment and electronic instruments. Thermocouples can measure high temperatures, but the measurement accuracy is not high, and cold junction compensation is required; platinum resistors have high measurement accuracy, but low measurement sensitivity , and it is necessary to compensate the connected leads; the thermistor is also commonly used as a temperature measuring element and a temperature control device, with high sensitivity, but the thermistor has a large nonlinearity and poor long-term stability

In general, electronic temperature sensors are susceptible to electromagnetic radiation interference, poor long-term measurement stability, and inability to realize long-distance signal transmission.

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