Non-contact human vital sign measurement method and device
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A vital sign and non-contact technology, applied in diagnostic recording/measurement, medical science, sensors, etc., can solve the problem that vital signs are easily affected by the environment
Inactive Publication Date: 2016-04-13
方姝阳
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[0005] One of the objectives of the present invention is to provide a non-contact method and device for measuring human vital signs, so as to solve the technical problems of the inherent defects of contact-type human vital signs measurement in the prior art and the technical problem that remote video measurement of vital signs is easily affected by the environment
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Embodiment 1
[0058] Embodiments of the present invention provide a non-contact method for measuring human vital signs, such as figure 1 shown, including:
[0059] Transmitting chirp continuous wave modulated millimeter waves to the human body that needs to measure vital signs;
[0060] Process the acquired echo signal reflected by the human body to obtain the intermediate frequency signal s 1 (t);
[0061] the intermediate frequency signal s according to the preset acquisition frequency 1 (t) Sampling to obtain a discrete signal s 1 (n);
[0062] Spectrum analysis and target detection are performed on the discrete signals, and breathing and heartbeat signals are extracted and separated to obtain breathing and heartbeat frequencies.
[0063] The present invention irradiates the human body with electromagnetic waves, collects echo signals containing physiological characteristic information such as human respiration and heartbeat, and utilizes the relationship between human body micro-mo...
Embodiment 2
[0091] The embodiment of the present invention also provides a non-contact human vital signs measurement device, which is implemented based on the above-mentioned non-contact human vital signs measurement method, including:
[0092] The transmitting module is used to transmit the millimeter wave modulated by the linear frequency modulation continuous wave to the human body that needs to measure the vital signs;
[0093] The receiving module is used to process the obtained echo signal reflected by the human body to obtain the intermediate frequency signal s 1 (t);
[0094] A sampling module, configured to perform the intermediate frequency signal s according to a preset sampling frequency 1 (t) Sampling to obtain a discrete signal s 1 (n);
[0095] The frequency acquisition module is used to perform frequency spectrum analysis and target detection on the discrete signals, extract and separate the breathing and heartbeat signals, so as to acquire the breathing and heartbeat f...
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Abstract
The invention relates to a non-contact human vital sign measurement method and a non-contact human vital sign measurement device. The method includes emitting millimeter waves modified by linear frequency modulation continuous waves to the human body needing vital sign measurement, processing acquired echo signals reflected by the human body to acquire an intermediate frequency signal s1(t), sampling the intermediate frequency signal s1(t) according to a preset sampling frequency to acquire a discrete signal s1(n), subjecting the discrete signal s1(n) to spectral analysis and target detection, and extracting and separating respiration signal and heartbeat signal so as to acquire respiration and heartbeat frequency. The device is implemented on the basis of the method. By the method and the device, non-contact measurement and monitoring to human respiration and heartbeat can be achieved, and alarm to abnormal respiration and heartbeat conditions can be sent; thus, the method and the device are applicable to vital sign dynamic monitoring for special population such as patients with extensive burns, psychopaths, infants and the like, and are also applicable to psychological assessment for staff in special majors.
Description
technical field [0001] The invention relates to the technical field of non-contact human vital signs measurement, in particular to a method and device for non-contact human vital signs measurement. Background technique [0002] The measurement of human vital signs refers to the use of some mechanical or electronic device to detect the physiological information of the human body, and the collected physiological information is converted into electrical or mechanical signals that can represent the physiological activities of the human body. [0003] The commonly used method is to use electrodes or sensors to contact the detection parts of the human body, and then obtain the physiological signals of the human body through analog signal amplification, filtering and signal processing. The contact-type human body sign measurement method is simple, easy to implement, and low in cost, but it also has some disadvantages: electrodes or sensors contact the body to be measured, and apply...
Claims
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