A flexible fixture for optical fiber sensor

Abstract

The invention discloses a flexible clamp for an optical fiber sensor. The flexible clamp comprises a clamping rod and a clamping head connected with the clamping rod in a matched manner, wherein a connecting rod is arranged at one end of the clamping rod; a counter bore is formed at one end of the clamping head; the connecting rod of the clamping rod is connected with the counter bore of the clamping head in a matched manner; an elastic body is arranged at the bottom end of the counter bore of the clamping head; one end of the elastic body is matched with the bottom end of the counter bore ofthe clamping head; the other end of the elastic body is matched with the end part of the connecting rod of the clamping rod; a through hole which is used for allowing a sensitive end of the optical fiber sensor to pass through and is used for clamping light transmitting optical fibers of the optical fiber sensor is arranged in the clamping rod; a first micro through hole which is used for allowing the sensitive end of the optical fiber sensor to pass through and is used for clamping the sensitive end of the optical fiber sensor is arranged in the elastic body; a second micro through hole which is used for allowing a sensitive end of the optical fiber sensor to pass through is arranged in the clamping head; and, the axis of the through hole, the axis of the first micro through hole and theaxis of the second micro through hole are positioned in the same straight line. According to the flexible clamp disclosed by the invention, the flexible clamping for the optical fiber sensor can be realized and the damage to the optical fiber sensor is avoided; in addition, the flexible clamp is firm and stable and can be reused.

Description

technical field [0001] The invention relates to a flexible fixture used for optical fiber sensor work, especially a sensor fixture used for high-intensity focused ultrasonic field measurement. Background technique [0002] In recent years, fiber optic sensors have been widely used in biology, medicine, industry, aerospace, military and other fields due to their advantages of miniaturization, simple structure, high sensitivity, high temperature resistance, high pressure resistance, and electromagnetic interference resistance. In specific applications or scientific research, it is necessary to detachably fix the fiber optic sensor, which requires high repeatability of neutralization and positioning; but because the fiber itself is brittle and easy to break, the traditional rigid clamping method is used to clamp the fiber During the process of sensor (especially the fiber sensor with sensitive fiber end), it is easy to damage the fiber sensor, and at the same time, the optical ...

AI Technical Summary

Problems solved by technology

In specific applications or scientific research, it is necessary to detachably fix the fiber optic sensor, which requires high repeatability of neutralization and positioning; but because the fiber itself is brittle and easy to break, the traditional rigid clamping method is used to clamp the fiber The optical fiber sensor (especially the optical fiber sensor that is sensitive to the end of the optical fiber) is easy to damage the optical fiber sensor during the process, and the optical path of the optical fiber itself may be twisted due to local stress, which affects the performance of the optical fiber sensor

In production or scientific research, some fiber optic sensors are fixed on solid structures by colloid, which is poor in repeatability; and the fiber holder in the fiber fusion splicer is not suitable for flexible clamping when the fiber optic sensor is working due to its large size. At the same time, the structure is complex and the cost is high

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