System and method for using light modulation to measure physiological data

A technology of physiological data and light modulation, applied in the direction of using spectrum diagnosis, using light for diagnosis, blood flow measurement, etc., can solve the problem of signal intensity drop, etc., and achieve the effect of reduced size and high sensitivity

Active Publication Date: 2012-10-03
HONG KONG APPLIED SCI & TECH RES INST
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Problems solved by technology

On the other hand, for non-contact operation, the absorption signal received by the detector is weaker, since the signal strength drops considerably with increasing optical distance from the human body to the detector

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  • System and method for using light modulation to measure physiological data
  • System and method for using light modulation to measure physiological data
  • System and method for using light modulation to measure physiological data

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[0033] As used herein and in the claims, "comprising" means including the following elements but not excluding others. "Connected" means electrically or mechanically connected, directly or indirectly, through one or more electrical or mechanical means, unless otherwise stated. Also, "locking" means modulating a signal at a fairly high frequency and then capturing it in a narrow bandwidth close to the modulating frequency with phase locked to reduce broadband noise. In one embodiment, it also refers to detecting a small light signal against a bright background.

[0034] The embodiments described herein disclose methods of capturing and analyzing human physiological data and can be implemented in a variety of ways. Specifically, an active mode structure and a passive mode structure are disclosed below. Based on the teaching of the present disclosure, those skilled in the art may also realize other structures or variants, but they should still be regarded as within the scope of...

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Abstract

The present invention discloses a device for measuring individual physiological data. The device comprises a light modulation unit, a light detection unit and a signal processing unit. The system can be operated in an active / passive mode to measure heart rate, respiratory system information, hemachrome level, cardiac output or blood oxygen saturation degree. The phase lock technology based on Fourier transform is used for detecting physiological signals, and reliable results can be obtained even if the signals are weak. Moreover, ambient light can be used as a light source to complete measuring.

Description

【Technical field】 [0001] The present invention relates to a measurement device, in particular to a device for non-contact measurement-individual physiological data. 【Background technique】 [0002] Medical measurement devices are already widely used to monitor vital parameters of our body. Photoplethysmography (PPG) is a method of non-invasive detection of living physiological data in which a device sends a light signal to living tissue and analyzes the light absorbance. [0003] A pulse oximeter is an example of such a measuring device. When the blood flows through the arteries and veins, it uses the different absorption ratios of red light and infrared light in the blood to directly monitor the blood oxygen saturation in the human blood. By using different amounts of light absorbed at different wavelengths, other PPG devices can be designed to measure different physiological signals. [0004] However, most of the PPG devices are of the contact type, directly touching the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0205A61B5/029A61B5/1455
CPCA61B5/0205A61B5/1455A61B5/029A61B5/0059A61B5/0075A61B5/02416A61B5/113
Inventor 朱聿熹郭嘉祥张春
Owner HONG KONG APPLIED SCI & TECH RES INST
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