Method and device for detecting respiration signals
A breathing signal and detection method technology, applied in the directions of diagnostic recording/measurement, medical science, sensors, etc., can solve the problem of poor detection performance of breathing signal, etc., and achieve the effect of improving performance
Active Publication Date: 2014-12-10
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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[0004] Based on this, it is necessary to provide a respiratory signal detection method that can improve the detection performance in view of the poor performance of the traditional respiratory signal detection
[0005] In addition, it is also necessary to provide a respiratory signal detection device that can improve the detection performance for the problem of poor detection performance of the traditional respiratory signal
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[0042] The technical solution of the breathing signal detection method and device will be described in detail below in conjunction with specific embodiments and accompanying drawings, so as to make it more clear.
[0043] Such as figure 1 Shown, in one embodiment, a kind of breathing signal detection method comprises the following steps:
[0044] Step S110, collecting original signals.
[0045] Specifically, the radar detector can be used to collect original signals in post-disaster rescue scenes or anti-terrorism scenes, and the original signals may include breathing signals. The original signal forms a radar echo matrix, which usually contains a lot of noise, clutter and interference. The radar echo matrix can be expressed by formula (1):
[0046]
[0047] In formula (1), Represents the radar echo matrix; r[m,n] represents the signal due to the movement of the chest surface; c[n] represents the clutter generated by the background environment; w[m,n] represents the sy...
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The invention relates to a method and a device for detecting respiration signals. The method comprises the following steps: original signals are collected; filter processing is conducted on the original signals, and filtering parameters adopted in filter processing are confirmed according to a harmonic structure of slow time domain respiration signals by analyzing in advance; a periodogram of slow time domain signals of the original signals is calculated after the filter processing; noise power of the slow time domain signals of the original signals is estimated after the filter processing; a harmonic graph is calculated according to the harmonic structure of the slow time domain respiration signals, the periodogram of the slow time domain signals and the noise power of the slow time domain signals; and whether the harmonic graph is larger than a preset threshold or not is judged, if the harmonic graph is larger than the preset threshold, the respiration signals exist, and if the harmonic graph is not larger than the preset threshold, the respiration signals do not exist. According to the method and the device for detecting the respiration signals, the filtering parameters are confirmed by adopting the harmonic structure of the respiration signals so that the filter processing is conducted, environmental noise can be filtered well, the respiration signals can be reserved as much as possible, and detecting performance is improved.
Description
technical field [0001] The invention relates to the field of physiological signal detection, in particular to a breathing signal detection method and device. Background technique [0002] Non-contact life detection is mainly used to detect the breathing movement of human body. In order to detect whether there are living organisms in the ruins after a disaster, non-contact life detection methods are often used for detection. The radar life detector is a detection system that integrates radar technology and biomedical engineering technology and can penetrate non-metallic media for non-contact and long-distance detection of living organisms. The high penetration performance and high positioning performance of UWB (Ultra Wide Band) pulse radar make it have broad application prospects in emergency rescue, anti-terrorism monitoring and other fields. [0003] The traditional UWB pulse radar life detection technology often regards the breathing signal of the human body as a sinuso...
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IPC IPC(8): A61B5/00
Inventor 乔登宇李鑫李烨胡波平孙佳平孙东芳张钦
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI