The photoelectric sensorsThe oxygen sensor is to detect the
oxygen saturation of the important parts
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inaurate detection or paralyzes the whole work. Aording to ape, the oxygen
sensor can be mainly classified to dwelling, earlobe, parcels and adhesion type.
And it can be divided into adult and children, infantile several uses.
Regardless of the ape and type, the spo2 sensor principle position is the sa,
and they are posed of a light emitting device and a receiving device. The light
emitting device consists of the wavelength of 660nm (650nm) red light and the
wavelength of 940nm (910nm) infrared light emitting tube posed. Most of the
photosensitive receiving device receiving area, high sensitivity, low dark
current, low noise, the PIN-type photodiode, it receives incident light signals
into electrical signals. The newly developed pulse oxiter takes the finger
sensor probe. Probe sets on the fingertip in the process of using. Two
juxtaposed light emitting diodes are fixed to the sleeve wall which emission
wavelengths are 660nm red light and 940nm infrared light, respectively. The
lower wall is a photosensitive reception device, and it converts the red and
infrared light transmitting through the finger into an electrical signal. When
the oxiter is running, the ti-aring driving circuit make the o light emitting
diodes emit light at a certain interval ti respectively
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light intensity ratio aording to the luminous intensity of the LED and photocell
respectively calculated a660 and a940, and then bined with experintal
calibration coefficients A and B, substituting into the foregoing formula, it
can be regarded as the values of the oxygen saturation of the absorption rate of
the whole blood.spo2 sensorThe oxitery system block diagramThe pulse oxiter
usually consists of the oxygen saturation detection module, IPC or PC, oxygen
detection probe (usually the finger), and so on. If we take the system built by
the oxygen saturation detection module, due to the different module voltage
level beeen the IPC or PC, they have to be also connected through the level
converter module, so that it is possible to conduct correct munications on the
spo2 sensors.The principle of no damage oxygen saturation detectionNo injury
oxygen saturation asurents are based on the principle that asurent of the amount
of arterial blood absorption of light varies with the arterial pulse. The basis
of studies has own that oxyhemoglobin and non oxyhemoglobin have different
absorption rates of the different wavelengths of incident light. When
monochromatic light irradiates in the human body vertically, the amount of light
absorption of arterial blood arteries pulsate changes with light transmission
area, and other organizations such as the skin, muscle, bone, and venous blood
absorption of light are constant.www.wireharnessesjm.Jurmay boasts a
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