Digital signal process method for light- frequency conversion type pulse blood oxygen instrument

A digital signal processing, pulse oximeter technology, applied in the fields of medical science, sensors, diagnostic recording/measurement, etc., can solve the problems of measurement technology difficulties, power consumption and dynamic range adjustment, etc., to improve the signal-to-noise ratio, cost and Low power consumption and small size

Active Publication Date: 2007-02-21
XI AN JIAOTONG UNIV
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Problems solved by technology

[0011] Aiming at the measurement technical difficulties caused by the limitation of the conversion frequency range of the existing LFC, the present invention proposes a digital signal processing method based on a fixed number pulse train cumulative timing, which can effectively solve the aforementioned problems in measuring the output pulse frequency and period of the LFC. The problems encountered in speed, power consumption and dynamic range adjustment can meet the requirements of professional-grade pulse oximeter anti-interference characteristics and measurement accuracy under weak perfusion conditions at a very low cost

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  • Digital signal process method for light- frequency conversion type pulse blood oxygen instrument
  • Digital signal process method for light- frequency conversion type pulse blood oxygen instrument

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments:

[0030] Such as figure 1 As shown, a light-frequency conversion digital pulse oximeter includes a red light emitting tube 3, an infrared light emitting tube 4, and a liquid crystal display 6. The red light emitting tube 3, the infrared light emitting tube 4 and the light emitting tube driver 2 are respectively The two outputs of the LED are electrically connected, and the input of the light-emitting tube driver 2 is connected to the signal of the microprocessor 1, which is a microprocessor with a capture logic interface, a universal serial interface and a liquid crystal display drive circuit. The capture logic interface of the microprocessor 1 is connected to the optical frequency converter 5, the liquid crystal display drive output port of the microprocessor 1 is connected to the display drive input port of the liquid crystal display 6, and the u...

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Abstract

A method for processing the digital signals of a light-frequency conversion type pulse oxyhemograph includes such steps as using a light-frequency converter to directly convert the light signals received by human tissue to the electric pulse signals, using microprocessor to count the electric pulse signals and time, and calculation to digital signals to obtain the blood oxygen saturation degree and cardiac rhythm value.

Description

Technical field [0001] The invention relates to a digital signal processing method of a digital pulse oximeter, in particular to a digital signal processing method of a light-frequency conversion pulse oximeter. Background technique [0002] Pulse oximeter is a non-invasive, continuous monitoring of human arterial blood oxygen saturation of medical equipment. It has become a routine configuration equipment for anesthesia monitoring and intensive care in hospitals. It is also widely used in various mobile monitoring and sleep monitoring outside the hospital. . The development of family and community health care systems has put forward new requirements for the design and manufacture of pulse oximeters, that is, it is hoped that low-cost, high-performance wearable pulse oximeters can be provided to be widely used in family and community medical networks. [0003] The working principle of pulse oximeter is based on oxyhemoglobin (HbO 2 ) And reduced hemoglobin (Hb) have different abs...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/1455
Inventor 孙卫新金捷郭萍杨新平孔澍
Owner XI AN JIAOTONG UNIV
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