Multi-functional Medical Analyzer Detection System Design

With the application of information technology and new materials,medical testing equipment changes with each passing day.The level of medical diagnostic work is greatly improved with the increasing number of testing items and the accelerating speed of testing.The purpose of this paper is to develop a multi-functional medical analyzer which is functional,reliable and portable,that can carry out on-site inspection quickly and as a supplement to the laboratory automation test instrument.By studying the testing principle and the analytical method of biochemistry,blood coagulation and specific protein,and according to the functional requirements and performance indicators of the analyzer,this article designed the system of multi-functional medical analyzer based on STM32F427 processor.,and organized the hardware and software of it rationally.On the hardware side,on the control of processor.A/D could collect the photocell signal which was amplified and converted;A NAND FLASH memory module was designed to store detected data;Detection system communicated with PC through USB;The RS232 circuit was used for debugging;Based on the portability consideration,the single-supply module was designed.On the software side,RT-Thread was adopted.Based on RT-thread,various drivers and several data processing methods specific to different test items were designed.The article focuses on the integration of different optical paths,the amplification of micro-current,the precision of single supply,the acquisition of wide range signal,the technology of scanning detection dual wavelength,the method of intelligent discriminant detected curve.Finally a series of experiments has been conducted and measured the absorption and scatteration light through a variety of samples.The accuracy and repeatability of measurement meets the requirement.