Respiratory information detecting method and device

Abstract

A respiratory information detecting device comprises a respiratory signal collection unit, a pre-amplification unit, a demodulation unit, a gain and offset unit, an analog-to-digital (A / D) conversion unit, a signal processing unit and a display. The A / D conversion unit is a multi-bit conversion unit of at least 16 bits. The inventive method and device is characterized by adopting a multi-bit A / D (more than or equal to 16 bit) conversion scheme, pre-amplifying a respiratory signal by low-power gain, directly acquiring the original respiratory signal by using multi-bit A / D conversion, analyzing and identifying minutiae features of the original respiratory signal by using software in MCU to obtain respiratory waveform approximate to a real signal as well as base resistance information of human body, and setting amplitude threshold of respiratory rate calculation by using the base resistance information of human body. Due to adopting the multi-bit A / D conversion, a hardware circuit has a relatively wide variable resistance detection range, the respiration measurement accuracy is improved, and the hardware circuit is simplified.

Description

technical field [0001] The invention relates to a detection method, in particular to a method and a detection device for detection of human breathing information. Background technique [0002] Respiratory parameters are an important physiological parameter in clinical monitoring. When a patient suffers from asphyxia or even dies, the asphyxia alarm of the monitoring device can promptly remind medical staff to pay attention to the patient's condition and avoid delaying the best treatment time for the patient. Clinically, the monitoring of respiratory parameters usually adopts the impedance method, because the impedance method can obtain respiratory parameters while monitoring the ECG parameters, does not require additional accessories, and is easy to implement, so it is widely used. [0003] The basic principle of the impedance method to measure respiration is that the monitoring equipment generates a high-frequency carrier signal of a certain frequency, and couples the carri...

AI Technical Summary

Problems solved by technology

[0012] The present invention provides a breathing information detection method and device, by preprocessing the signal, and further adopting multi-bit A / D conversion and software low-pass filtering and detection and calculation methods to solve the problem of poor anti-motion effect and circuit failure in the prior art. Technical problems of complex structure and distortion of respiratory waveform

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