Finger recognition method for reflective oximeter
An identification method and technology of an oximeter, which is applied in the field of finger identification by a reflective oximeter, can solve problems such as finger identification failure, increased button circuit costs, and inability to start collection, etc., to achieve accurate judgment results, strong practicability, and steps precise effect
Active Publication Date: 2017-09-22
CONTEC MEDICAL SYST
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Problems solved by technology
The method of identifying the finger by setting the button circuit not only needs to increase the cost of the button circuit, but also due to the aging of the button or the circuit device, the finger recognition function will fail, resulting in the inability to start the collection
Method used
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[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0036] The finger recognition method of the reflective oximeter of the present invention is formed by using the original reflective oximeter, inputting a computer program to control the opening of the oximeter in the original oximeter, and forming according to the optical signal received by the receiving sensor The frequency signal changes to determine whether there is a finger on the reflective oximeter, so as to determine whether to turn on the reflective oximeter and perform detection.
[0037] In the reflective oximeter, the light intensity threshold, weak light presence or absence of finger judgment threshold, and strong light presence or absence of finger judgment threshold are preset, and a double-pulse square wave is loaded on the emission sensor of the reflective oximeter. The square wave controls the transmitting sensor so that the transmitting sens...
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The invention discloses a finger recognition method for a reflective oximeter, which belongs to the field of medical equipment; the finger recognition mainly includes the following steps, step 1: converting the light signal received by the receiving sensor into a frequency signal when the transmitting sensor emits the light signal, and then Compare with the pre-set light intensity threshold to judge whether the lighting environment is a weak light environment or a strong light environment; Step 2: According to the results obtained in step 1, by analyzing the light received by the receiving sensor when the double pulse square wave is at a high level The frequency signal formed by the signal and the frequency signal formed by the optical signal received by the receiving sensor when the double-pulse square wave is low level, determine whether there is a finger; Step 3: decide whether to turn on the reflective oximeter. The invention can automatically turn on the blood oxygen meter accurately and reliably, has simpler design and simpler circuit, and can prolong the service life of the blood oxygen meter.
Description
technical field [0001] The invention relates to a method for identifying fingers by a reflective oximeter, which belongs to the field of medical devices. Background technique [0002] The blood oxygen meter can be used to detect the blood oxygen saturation of the human body. By detecting the ratio of the absorbance change rate of the peripheral tissues of the human body, such as fingers and earlobes, to different wavelengths of red light and infrared light, the arterial blood of the peripheral tissues can be calculated. oxygen saturation. [0003] The reflective oximeter has two or more sensors in the same plane. The transmitting sensor will send out a light signal when it receives the light-emitting pulse command, and the emitted light will illuminate the finger surface vertically. Underneath, the light shines into the finger and enters the receiving sensor in a reflective manner; the receiving sensor is a photoelectric sensor that converts light signals into electrical si...
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IPC IPC(8): A61B5/1455
CPCA61B5/14551A61B5/14552A61B5/6826
Inventor 胡坤许云龙张金玲吴迪宋智超赵林源罗凤勇
Owner CONTEC MEDICAL SYST