A vital sign monitoring device

Abstract

The invention proposes a vital sign monitoring device, which monitors vital sign information based on the principle of bending loss, which can reduce the influence of optical phase fading and polarization, and monitor vital signs such as breathing and heartbeat signals more accurately; by setting a small core diameter optical fiber , the small vibration caused by extrusion caused by breathing and heartbeat causes the bending change of the optical fiber, and the optical signal will undergo obvious intensity modulation in the small core fiber with more sensitive bending loss, and the output at the output end of the sensing fiber follows the breathing and heartbeat The optical power of the correlation change has higher sensitivity and better accuracy; setting a hard line can have a sensitization effect.

Description

technical field [0001] The invention relates to the field of monitoring human vital signs, in particular to a vital sign monitoring device. Background technique [0002] With the development of social economy and technology and the improvement of people's requirements for quality of life, people's demand for testing their own health is increasing. Respiratory rate and heart rate are the most basic vital signs of the human body. Morbid signs of the human body are often reflected in abnormal respiration rate and heart rate. Therefore, daily real-time monitoring of respiration rate and heart rate is of great significance for human health assessment and disease prevention . Long-term breathing rate and heartbeat monitoring can enable the health status of the monitored person to be monitored and mastered in real time. However, most traditional monitoring systems use contact-type wearable devices, which have poor user experience. The monitoring not only interferes with the life o...

AI Technical Summary

Problems solved by technology

The sensing system based on the principle of optical fiber sensing has the characteristics of high sensitivity, good comfort, and anti-electromagnetic interference. However, the current monitoring device system structure and manufacturing process based on fiber grating sensors are complicated, and the acquired signals need to be demodulated by wavelength, which leads to system failure. The cost is too high and the demodulation method is complicated

The monitoring system based on the principle of interference either requires phase demodulation, which leads to complex demodulation methods and high system costs, or the interference signal is easily affected by the environment, polarization and phase fading and cannot accurately extract the complete breathing and heartbeat signals.

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