Narrow-beam millimeter-wave human heartbeat/respiratory sign monitoring device with controllable irradiation direction

Abstract

The invention discloses a narrow-beam millimeter-wave human heartbeat / respiratory sign monitoring device with controllable irradiation direction. The device comprises a millimeter-wave radar, a millimeter-wave lens antenna, an AD acquisition card, an intelligent beam control mechanism and upper computer software, a specially-made narrow-beam low-sidelobe small-size millimeter wave antenna lens is additionally arranged at the front end of a radar receiving and transmitting antenna, so that the signal-to-noise ratio of a radar receiver is improved. The direction of a main beam of a radar device is changed through a beam control mechanism, and the maximum position of the monitored human body surface heartbeat amplitude is automatically searched for according to the amplitude characteristics obtained after phase demodulation of intermediate frequency signals of the radar receiver. The device reduces the influence of respiratory harmonics and clutters on heart rate discrimination, improves the heart rate measurement precision, is suitable for single-person or multi-person monitoring, achieves the precise measurement of respiratory and heartbeat frequencies under the condition of no contact with a human body, can recognize the abnormal physiological states of arrhythmia, respiratory failure and the like, improves the accuracy of heart rate measurement, has an application prospect in the aspect of clinical dynamic monitoring of critical patients with infectious diseases and burns, and is also used for vital sign monitoring in daily life.

Description

technical field [0001] The invention relates to the technical field of non-contact human vital signs monitoring, in particular to a narrow-beam millimeter-wave human heartbeat / respiratory sign monitoring device with controllable irradiation direction. Background technique [0002] Breathing and heartbeat are important vital signs of the human body, and whether their frequency is normal or not is an important basis for judging changes in a patient's health status. At present, when heartbeat and respiratory rate are monitored clinically, electrodes need to be pasted on the body surface. The preparation work is complicated, and it may cause skin allergies or discomfort. It is not suitable for long-term monitoring, and there is even a risk of cross-infection. Therefore, reliable monitoring of heartbeat / breathing rate without direct contact with the body is of great significance for the monitoring and diagnosis of seriously ill patients, especially those with limited mobility. ...

AI Technical Summary

Problems solved by technology

Due to the small amplitude of the heartbeat signal, there is a problem that the harmonics and clutter of the respiratory signal interfere with the heartbeat signal, which affects the accurate measurement of the frequency of the heartbeat signal

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