Method for detecting human respiration rate and heart rate based on quadrature demodulation pulse ultra-wideband radar
A pulsed ultra-wideband, quadrature demodulation technology, applied in diagnostic recording/measurement, medical science, diagnosis, etc. Effect
Active Publication Date: 2021-06-08
SUN YAT SEN UNIV
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[0004] In view of the above-mentioned problems, the present invention provides a method for detecting human respiration rate and heart rate based on an orthogonal demodulation pulse ultra-wideband radar that solves at least some of the above-mentioned technical problems. The present invention is based on an orthogonal demodulation pulse ultra-wideband (IR-UWB) radar Measure the regular movement of the human chest caused by respiration and heartbeat to obtain the respiration rate and heart rate of the human body, achieving high accuracy of measurement values with low computational complexity
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[0035] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0036] refer to figure 1 As shown, the method for detecting human respiration rate and heart rate based on orthogonal demodulation pulse ultra-wideband radar provided by the embodiment of the present invention includes the following steps:
[0037] Include the following steps:
[0038] S10, the pulse ultra-wideband radar is initialized, and the pulse repetition frequency is set to 10 Hz;
[0039] S20, transmit the pulse signal th...
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The invention discloses a method for detecting human breathing rate and heart rate based on an orthogonal demodulation pulse ultra-wideband radar, comprising: initializing the pulse ultra-wideband radar; transmitting the pulse signal and receiving the echo signal; obtaining the original digital sampling of the echo through analog-to-digital conversion The final signal is converted into the radar echo I / Q signal of quadrature demodulation; the phase difference is obtained; the weighted average is carried out to obtain the data of the distance change between the chest cavity of the object to be measured and the radar antenna; a sequence of data is obtained; The frequency domain signal of the distance transformation is obtained by Liye transformation; the frequency corresponding to the peak value of the signal in the heartbeat frequency range and the breathing frequency range is obtained as the corresponding heartbeat and breathing frequency of the object to be measured. The method is based on the pulse UWB radar with orthogonal demodulation to measure the regular movement of the human chest caused by respiration and heartbeat to obtain the respiration rate and heart rate of the human body. Compared with traditional filters, this method reduces computational complexity and improves the saliency of heart rate detection.
Description
technical field [0001] The invention belongs to the field of non-contact physiological index measurement, in particular to a method for detecting human breathing rate and heart rate by orthogonal demodulation pulse ultra-wideband radar based on difference. Background technique [0002] Non-contact measurement can avoid many inconveniences caused by contact measurement. The patent publication number is: CN108577815A uses a Butterworth band-pass filter, and the complexity is relatively high. For the non-differential measurement method, due to the relationship between the respiration rate and the heart rate, the harmonics of the respiration signal have a great influence on the measurement of the heart rate. [0003] Therefore, in the prior art, the measurement method of human respiration rate and heart rate using ultra-wideband radar has a relatively high computational complexity, and there is still room for improvement in accuracy. Contents of the invention [0004] In vie...
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IPC IPC(8): A61B5/0205
CPCA61B5/0205A61B5/725
Inventor 刘倍典朱祥维陈哲正陶文宇
Owner SUN YAT SEN UNIV