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Respiratory information detecting method and device

A technology for information detection and breathing signals, applied in the detection field, can solve problems such as poor anti-motion effect, complex circuit structure, and respiratory waveform distortion, and achieve the effects of improving accuracy, simplifying hardware circuits, and wide dynamic range

Active Publication Date: 2012-07-11
EDAN INSTR
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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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  • Respiratory information detecting method and device
  • Respiratory information detecting method and device

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Embodiment Construction

[0026] Specific embodiments of the present invention are described with reference to the above drawings.

[0027] Depend on figure 2It can be seen from the figure that the respiratory information detection device of the present invention includes a respiratory signal acquisition unit 201, a pre-amplification unit 202, a demodulation unit 203, a gain and offset unit 204, a low-pass filter unit 205, and an A / D conversion unit 206 connected in sequence. , a respiration signal preprocessing unit 207, a respiration rate calculation unit, a respiration rate, an alarm information sending unit 209, and a main computer unit 210, the A / D conversion unit is a multi-bit conversion unit with at least 16 bits. The respiratory signal acquisition unit 201 collects the respiratory signal through a sensor, the respiratory signal is a respiratory amplitude modulation signal, and sends the respiratory amplitude modulation signal to the pre-stage amplification unit 202, and then performs low-magn...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/08
Inventor 吴祖军
Owner EDAN INSTR
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