Non-contact heart rate detection method based on head movement

A non-contact, detection method technology, applied in the measurement of pulse rate/heart rate, diagnostic recording/measurement, medical science, etc., can solve problems such as difficulty in ensuring accuracy and low signal-to-noise ratio of head movement signals, and achieve improved Signal-to-noise ratio, accurate non-contact heart rate detection, and the effect of non-contact heart rate detection

Pending Publication Date: 2019-01-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, the BCG method for heart rate detection is realized by extracting the tiny impact of the head being pumped by the heart in the image. Due to the small amplitude, the signal-to-noise ratio of the extracted head motion signal is low. If this signal is directly applied It is difficult to guarantee the accuracy of heart rate detection

Method used

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  • Non-contact heart rate detection method based on head movement
  • Non-contact heart rate detection method based on head movement
  • Non-contact heart rate detection method based on head movement

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Embodiment Construction

[0021] In order to clearly illustrate the technical solution proposed by the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] The schematic diagram of the experimental method is attached figure 1 As shown, the method includes a light source 1, a plane mirror 2, an imaging device 3, and a receiving screen 4. The light beam emitted by the light source is reflected by the plane mirror 3, and after reaching the receiving screen 4, a light spot is formed on its surface. The imaging device 3 is placed on the heart rate monitor. In front of the object 5, the video of the light spot movement on the receiving screen 4 is obtained.

[0023] The principle of optical lever is attached figure 2 As shown, its working principle is: the light beam emitted by the light source 1 is reflected by the flat mirror 2 on the forehead to the receiving screen, forming a spot S on the receiving screen. D...

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Abstract

The invention discloses a non-contact heart rate detection method based on head movement. the invention realizes the amplification of the head movement signal used in the cardiography technology, themovement state of the head is characterized by the light spot signal amplified by the movement amplitude, The signal-to-noise ratio (SNR) of the motion trajectory signal can be effectively improved incomplex background, and the accurate non-contact heart rate detection can be realized by processing the light spot motion signal, which can solve the problem that the amplitude of the original signalis small and the SNR is low.

Description

technical field [0001] The invention belongs to the technical field of human health monitoring, and relates to a non-contact heart rate detection method based on head movement. Background technique [0002] Heart rate is the number of times a normal person's heart beats per minute in a quiet state. It is called resting heart rate or resting heart rate. According to the difference in detection technology and methods, it can be divided into contact type and non-contact type. However, contact detection will It can cause physical discomfort, stimulation or pain to the patient, and even cause physiological changes to affect the accuracy of the test results. Moreover, these methods are not suitable for long-term contact with the human body, and are not suitable for long-term detection and daily monitoring at any time. Especially for patients with extensive burns, patients with mental illness, infants and other patients who cannot cooperate autonomously, it is not suitable to use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/024
CPCA61B5/024A61B5/7203A61B5/7225A61B5/7257
Inventor 孔令琴庞宗光赵跃进刘明董立泉惠梅刘小华吴育恒
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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