| 摘要 |
An optical sensor for noninvasive determination of concentrations of indicators of human blood has consistently placed the source of optical radiation measurement object and the registrar of the radiation. According to the invention, a system of analysis and control is introduced, which is connected to a source of optical radiation and a photodetector, and ensures a system of forces pressing F (whose value is chosen so as to provide most of the outflow of blood from the measuring volume V),which is mechanically connected to the source of optical radiation and photodetector, and electrically - with the system of analysis and control, with the resulting value of the process of non-invasive measurement of blood formed as the difference I=I-Iwhere I- the value of measurement which is determined and stored in the system with switched on system of providing of power pressing F (first phase of the measurement process), and I- the value of measurement which is determined and stored in the switched off system to ensure power pressing F (second phase of the measurement process). In addition the optical density of the biological environment, which is proportional to the concentration of blood parameters are measured in the range &Dgr;λ= 100-2500 nm, at a discrete wavelength λ, which corresponds to the resonance (maximum) absorption and/or omission of a specific indicator of human blood.The invention can significantly improve the measurement accuracy, as that the state of both internal and external tissues (epidermis, dermis, etc.) is taken into account. |
