Method and device for automatically detecting failure of blood oxygen probe

Abstract

The invention relates to the technical field of fault detection, in particular to a method and device for automatic fault detection of a blood oxygen probe. The present invention drives the selected light-emitting device multiple times to emit light with different preset light-emitting light intensity values, and collects the actual current value and actual voltage value on the light-emitting device, and collects the actual received light intensity value received by the receiving device; Generate the standard volt-ampere curve and the actual volt-ampere curve of the light-emitting device respectively, and analyze and compare them to obtain the detection results of the light-emitting device; respectively generate the standard light intensity-current curve and the actual light intensity-current curve, analyze and compare them, and obtain the receiving The detection results of the device; the present invention analyzes and records the detection results of two kinds of photoelectric devices, and identifies the fault type of the blood oxygen probe to provide more comprehensive fault alarm information. At the same time, from the statistics of the detection data, the photoelectric The deterioration degree and deterioration speed of the device are used to predict the potential failure risk.

Description

technical field [0001] The invention relates to the technical field of fault detection, in particular to a method and device for automatic fault detection of a blood oxygen probe. Background technique [0002] In the pulse-type non-invasive blood oxygen saturation measurement technology, the red light and infrared light are generally emitted by the light-emitting device in the blood oxygen probe, and after being transmitted or reflected by human tissue, the receiving device in the blood oxygen probe sends The transmitted light or reflected light is received and converted into an electrical signal, which is sent to the single-chip microcomputer for related calculations to obtain blood oxygen measurement results. Therefore, once the blood oxygen probe fails, it will directly affect the measurement of blood oxygen saturation. [0003] At present, the detection method of the blood oxygen probe is generally to judge whether there is a short circuit or a short circuit between the...

AI Technical Summary

Problems solved by technology

However, the existing detection methods only locate the fault of the blood oxygen probe after the fault occurs, and do not detect and judge the photoelectric characteristics of the light emitting device and the receiving device inside the probe, so the fault cannot be located to the photoelectric device itself

For example, the light intensity of the light-emitting device attenuates, the volt-ampere characteristic curve of the light-emitting diode is abnormal, and the receiving ability of the receiving device is poor, etc. The defects of these photoelectric devices are not the same as the short circuit or open circuit between the probe pins. It is difficult to be detected by the method. In addition, due to the deterioration process of these light-emitting devices, the deterioration of the photoelectric characteristics of the light-emitting device and the receiving device is usually a potential risk of probe failure, such as the volt-ampere characteristics of the light-emitting device. Abnormal changes in the curve may cause instability of the blood oxygen value. If these situations are not identified, the unstable measurement results may mislead doctors to make wrong judgments

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