A Multi-user Respiratory Frequency Detection System Based on Optical Fiber Sensing

Abstract

The invention belongs to the technical field of medical respiratory monitoring system, specifically a multi-user respiratory frequency detection system based on optical fiber sensing, including a signal generation unit, an optical fiber ring ring down processing unit and a signal processing unit, the optical fiber ring down The processing unit includes an optical fiber delay line, a distributed FLRD and an optical fiber ring ring down cavity, the distributed FLRD attenuates the light entering the distributed FLRD by receiving the gas exhaled by the user, and the signal processing unit includes a signal processing module, using Distributed optical fiber ring cavity ring down technology detects the concentration of carbon dioxide exhaled by patients, which can not only monitor the respiratory frequency information of multiple patients at the same time, but also give alarm reminders to patients with abnormal breathing. It has the advantages of high precision, low cost and rapid system response.

Description

technical field [0001] The invention relates to the technical field of medical respiratory monitoring systems, in particular to a multi-user respiratory frequency detection system based on optical fiber sensing. Background technique [0002] Respiration is the process of gas exchange between the human body and the external environment and the maintenance of normal physiological functions of the human body. Respiration is an important parameter in physiological testing, and the monitoring of respiratory frequency is of great significance for the timely diagnosis and treatment of some related diseases. There are many methods for the detection of respiratory rate, wherein the typical methods are as follows: [0003] 1. The differential pressure sensor detects the respiratory pressure difference method. For example, in the patent EP1935445 of General Electric Company of the United States, a differential pressure sensor is used to determine the pressure difference between the re...

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Problems solved by technology

but very expensive

[0005] 3. Electric signal detection breathing method, such as the patent CN102215746A of Nanyang Technological University in Singapore, which uses high-frequency radio signals to load the human body’s electric wave signals due to chest heartbeat and respiratory movement, which solves the problem that "wired" devices are difficult to implement and inconvenient for practical use. , but are susceptible to electromagnetic interference (EMI), which can be a significant problem in certain clinical examinations, such as magnetic resonance imaging (MRI) examinations

[0009] However, the above detection schemes for respiratory frequency are all for detection and monitoring of a single patient. Considering the actual situation, there may be two or more patients in an optical fiber ring down processing unit (nursing home) that need to perform respiratory detection at the same time, so it is necessary Realize a set of equipment and instruments to detect the respiratory frequency of multiple patients at the same time

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