The Realization Of Portable Non-invasive Blood Glucose Detector

At the current medical level,diabetes cannot be completely cured.It can only reduce the incidence of complications by preventing and managing blood glucose levels.For blood glucose concentration management,the most common method is to use electrochemical detection.This method has many disadvantages,such as causing pain to the body,risk of infection,and the like.The non-invasive technique for blood glucose detection is of great significance for reducing the pain during the minimally invasive or invasive measurement of diabetic patients,reducing the cost of detection,and achieving the detection and management of blood glucose concentration at any time.For the problem of minimally invasive or invasive blood glucose detection methods on the market,this paper designed and implemented a portable non-invasive blood glucose monitor system based on the principle of diffuse reflectance of near-infrared light.The system always took the product design thinking as a guide,and took the realization of product functions as a goal,guiding the entire process of system implementation.At the same time,based on the humanized design of medical device products,this study initially proposed the design requirements of the system structure and system UI interface and has achieved preliminary results,and finally completed the prototype of the instrument and performed a preliminary verification of the instrument performance.This paper mainly completed the following work:(1)After reading the literature and learning about Lambert-Beer’s law,this paper analyzed and evaluated the feasibility of non-invasive blood glucose detection based on the principle of near-infrared diffuse reflectance,and summarized the basic steps for near-infrared non-invasive blood glucose detection.(2)This paper studied the technical implementation of the portable non-invasive blood glucose detector system.The system selected two different wavelengths of monochromatic light,one as the system’s measurement light source to obtain blood glucose measurement information,and the other as the system’s reference light source to remove background noise during blood glucose detection.Focusing on the goals of system functions,this paper analyzed and discussed in detail the selection of the wavelength of the light source,the location of the detection location,the location of the receiving point,and the requirements for designing the system structure and UI interface.(3)Based on demand analysis and market research,we further refined and managed system functions.The system used two beams with wavelengths of 1550 nm and 1310 nm as the system measurement light source and reference light source,and used the liquid crystal touch screen as the display platform for human-machine interaction of the system.Taking the MSP430 microcontroller as the core of the system control and operation,the system realized simultaneous acquisition of two light source time-division driving,detection of reference optical path signal and optical path signal,establishment and inquiry of user information,processing and calculation of spectral data,and storage of data,prediction of blood glucose results and trend analysis and other instrument functions.(4)This article determined the instrument performance indicators,and then tested the performance of various functional modules.Under the premise of guaranteeing the performance reliability of each discrete module,we completed the prototype of the instrument system and completed preliminary prototype testing and functional verification.