JPH0552730U - Optical fiber temperature sensor - Google Patents

Abstract

(57) [Summary] [Objective] In an optical fiber temperature sensor, fixing is facilitated, temperature measurement is stabilized, and temperature measurement error is reduced. [Structure] A light-emitting element 2 is provided on the end face of an optical fiber 1 in a silicone.
The resin 3 is attached so as to cover the entire surface, the epoxy resin 4 is covered so that the cross section of the optical fiber 1 perpendicular to the axial direction is formed into a square shape, and the epoxy resin 4 is covered with the fluororesin 5.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an optical fiber temperature sensor.

[0002]

[Prior Art]

 In the conventional optical fiber temperature sensor, as shown in FIG. 2, a light emitting element 2 made of a semiconductor material such as gallium arsenide is attached to the tip of the optical fiber 1 with the coating removed, and the entire light emitting element 2 is sealed. It is covered with resin 3 and further covered with epoxy resin 4.

When the light sent from the measuring instrument through the optical fiber 1 reaches the light emitting element 2, the light emitting element 2 emits another light. The wavelength of this light changes as the temperature of the light emitting element 2 changes. This light is sent to the measuring instrument through the optical fiber 1. The measuring instrument can read the wavelength change of this light and obtain the temperature.

[0004]

[Problems to be solved by the device]

 However, since the conventional optical fiber temperature sensor has a circular cross section, when the surface temperature of the DUT 6 is measured, the contact portion becomes a line contact, so that the heat conduction deteriorates and the optical fiber temperature sensor moves. The measurement becomes unstable because it is easy to do, and a large error appears in the measured value of the surface temperature.

In view of this, the present invention is an optical fiber temperature sensor in which heat conduction is good and the optical fiber temperature sensor is easily fixed so that the temperature measurement is stable, and the temperature measurement error is reduced. .

[0006]

[Means for Solving the Problems]

 In the present invention, in the vicinity of the light emitting element attached to the tip of the optical fiber, the outer shape of the sensor body is a plane shape parallel to the axial direction of the optical fiber.

[0007]

[Action]

 In the optical fiber temperature sensor of the present invention configured as described above, since the flat surface parallel to the axial direction of the optical fiber is brought into contact with the object to be measured, the contact portion becomes surface contact. , The heat conduction is improved, and the fixation becomes easy, so the temperature measurement becomes stable and the temperature measurement error is reduced.

[0008]

【Example】

 FIG. 1 is an example of the optical fiber temperature sensor of the present invention. The end face of the optical fiber 1 is cut so that it is perpendicular to the axial direction of the optical fiber 1. Then, the light emitting element 2 and the optical fiber 1 are bonded with the silicone resin 3a so that the surface of the light emitting element 2 where the luminescence light is emitted and the end surface of the tip of the optical fiber 1 are parallel to each other. Further, in order to further protect the entire light emitting element 2, the entire light emitting element 2 is covered with the silicone resin 3. In order to further reinforce, the epoxy resin 4 is covered, and the epoxy resin 4 has a quadrangular cross section perpendicular to the axial direction of the optical fiber 1, and the outside of the epoxy resin 4 is covered with the fluororesin 5. This optical fiber temperature sensor measures the temperature of the surface of the DUT 6 by bringing a plane parallel to the axial direction of the optical fiber 1 into contact with the surface of the DUT 6.

According to this, the surface is in contact with the object to be measured, so that the heat conduction is good and the fixing is easy, so that the temperature measurement is stable and the temperature measurement error is reduced. The cross section does not necessarily have to be rectangular.

[0010]

[Effect of the device]

 According to the present invention, because of the surface contact with the object to be measured, the heat conduction is good and the fixing is easy, so that the temperature measurement is stable and the temperature measurement error is reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an optical fiber temperature sensor of the present invention.

FIG. 2 is a diagram showing an example of a conventional optical fiber temperature sensor.

[Explanation of symbols]

 1 Optical Fiber 2 Light Emitting Element 3a Silicone Resin 3 Silicone Resin 4 Epoxy Resin 5 Fluorine Resin 6 DUT

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Akira Ito Akira Ichi, Nishi-Kasugai-gun, Nishibiwajima-cho, 3-chome, Yoshino-cho 1-chome, Takadake Manufacturing Co., Ltd. 3-chome, Yoshinocho Takataka Manufacturing Co., Ltd. Technology Development Center

Claims (1)

[Scope of utility model registration request] 1. An optical fiber temperature sensor in which, in the vicinity of a light emitting element attached to the tip of an optical fiber, the outer shape of a sensor body is a flat surface parallel to the axial direction of the optical fiber.