Optical fiber sensor and vital sign detecting device

Abstract

The invention discloses an optical fiber sensor and a vital sign detecting device. The optical fiber sensor comprises an optical fiber and further comprises an elastomer, wherein the optical fiber isprovided with a bent detecting section, and the elastomer is used for changing the bending curvature of the detecting section through elastic deformation. According to the optical fiber sensor and thevital sign detecting device, the sensor comprises the detecting section formed after the optical fiber is bent, the detecting section is fixedly connected with the elastomer, the elastomer has elastic deformation under the influences of temperature or pressure or other stimulation, and therefore the curvature of the detecting section of the optical fiber is changed; according to the principle ofthe macro-bending loss of the optical fiber, by detecting the intensity variation of the light received by a light receiver, the detection of external stimulation can be realized; the sensor is simplein structure and low in cost; by arranging the sensor in a certain structure, the sensor can be directly used for detecting pulse, respiration and other human vital signs, the detection process is not influenced by human skin color or ambient light, and the sensor is wide in application range and convenient to operate.

Description

technical field [0001] The present application relates to the field of optical fiber sensors, in particular to an optical fiber sensor and a vital sign detection device. Background technique [0002] Optical fiber sensor is a sensor that converts the state of the measured object into a measurable optical signal. Fiber optic sensors have a wide range of applications, involving almost all important fields in the national economy and national defense and people's daily life, and can be used safely and effectively in harsh environments. The working principle of the fiber optic sensor is to send the light beam incident from the light source into the modulator through the optical fiber, and interact with the measured parameters outside the modulator to make the optical properties of the light such as light intensity, wavelength, frequency, phase, polarization state, etc. It changes and becomes a modulated optical signal, which is then sent to the optoelectronic device through the...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an optical fiber sensor and a vital sign detection device, aiming to solve the problems of complex process and high cost of existing optical fiber sensing equipment

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