Detection terminal for degree of blood oxygen saturation
A technology for detecting terminal and saturation, which is applied in the field of blood oxygen saturation detection terminal, can solve problems such as single form, easy to be interfered by other signals, complicated detection process of blood oxygen saturation, etc. simple effect
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Embodiment 1
[0015] like figure 1 As shown, the present invention includes a microprocessor, a D / A converter, an A / D converter, an LED drive circuit and a photoelectric sensor, and the microprocessor is simultaneously connected to the D / A converter, the A / D converter, and the voice broadcast. The D / A converter is also connected to the LED drive circuit, the photoelectric sensor, the amplifier, the filter, the signal conditioning circuit, the voltage-current conversion circuit and the integrating circuit in sequence, and the integrating circuit is also connected to the A / D converter. When in use, the microprocessor generates driving signals of red light with a wavelength of 660nm and infrared light with a wavelength of 940nm in time-sharing, and transmits the signals to the LED driving circuit after D / A conversion. The LED drive circuit amplifies the power of this signal, and then sends it to the red light and infrared light emitting diodes placed in parallel on the upper arm of the photoel...
Embodiment 2
[0017] This embodiment is preferably as follows on the basis of Embodiment 1: the photoelectric sensor is a finger-sleeve photoelectric sensor. The photoelectric sensor is convenient to be put on the human body and is not easy to slip off, which further ensures the accuracy of measurement.
[0018] The signal conditioning circuit is a signal conditioning circuit capable of performing signal baseline level transformation and removing DC components. To further ensure the accuracy of the final measurement signal.
[0019] The microprocessor model is C8051F020. It is a fully integrated mixed-signal system-level MCU chip with 64 digital I / O pins or 32 digital I / O pins, which can fully meet the measurement needs.
[0020] The microprocessor is a microprocessor capable of generating red light and infrared light driving signals in time division. Photoelectric sensor is used because the absorption rate of oxyhemoglobin and reduced hemoglobin in blood to red light with wavelength of ...
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