Low-power consumption and high-precision front processing module of photoelectric plethysmograph signal based on ambient light

A technology of photoplethysmography and front-end processing, which is applied in the field of biomedical signal processing and can solve problems such as energy waste

Active Publication Date: 2010-01-20
SHENZHEN INST OF ADVANCED TECH +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, when the ambient light is sufficient, it is also a waste of energy to still use LEDs as light sources

Method used

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  • Low-power consumption and high-precision front processing module of photoelectric plethysmograph signal based on ambient light
  • Low-power consumption and high-precision front processing module of photoelectric plethysmograph signal based on ambient light
  • Low-power consumption and high-precision front processing module of photoelectric plethysmograph signal based on ambient light

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Embodiment Construction

[0020] figure 1 It is a schematic diagram of the application of PPG signal front-end processing module in wearable medical instruments. The PPG signal front-end processing module 1 can be installed in the ring 2 with the function of measuring physiological parameters based on PPG signal processing, the clothes 3 with the function of measuring physiological parameters based on PPG signal processing, and the clothing with the function of measuring and displaying physiological parameters based on PPG signal processing. A watch 5 or a mobile phone 6 with physiological parameter measurement and display functions based on PPG signal processing. The processed PPG signal is transmitted to the data processing and display terminal 4 in a wireless transmission manner. Low power consumption and high precision PPG signal front-end processing module can be implemented with discrete components or integrated circuits.

[0021] figure 2 It is the circuit structure diagram of the PPG signal...

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Abstract

The invention relates to a front processing module of a photoelectric plethysmograph signal, which comprises a first photoelectric receiver, a second photoelectric receiver, a first front processing circuit of the photoelectric plethysmograph signal, a second front processing circuit of the photoelectric plethysmograph signal, a first transmission circuit, a second transmission circuit, a comparison circuit, an LED control circuit and an LED. When ambient light is enough and the signal quality is good, the ambient light is utilized as a light source, and the LED is turned off. When the ambient light is not enough and the signal quality is poor, the ambient light and the LED are used as the light source. The output of the front processing circuit of the photoelectric plethysmograph signal can provide an input for adaptive filtering. The front processing module of the photoelectric plethysmograph signal has the advantages of low power consumption and high precision.

Description

technical field [0001] The invention relates to the field of biomedical signal processing, in particular to a photoplethysmography signal front-end processing module. Background technique [0002] Photoplethysmography signal (PPG) has a good application prospect in the non-invasive detection of human blood pressure, blood flow, blood oxygen, brain oxygen, muscle oxygen, blood sugar, microcirculation peripheral blood vessel pulse rate, respiratory rate and respiratory volume. The PPG signal front-end processing module is an important part of these wearable non-invasive testing instruments. [0003] Wearable medical instruments require low power consumption, thereby reducing system heat dissipation, reducing battery size, and extending battery life. Whether it is an integrated circuit or a discrete circuit, most of the designer's energy is focused on reducing the power consumption of the circuit itself. In fact, the power consumption of LEDs has already accounted for a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0295
Inventor 张元亭李严
Owner SHENZHEN INST OF ADVANCED TECH
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