1. The development process and principle of the automatic blood analyzer system
Using the principle of capacitance method and photoelectric colorimetry, only red blood cells and white blood cells could be measured at that time, and it was easily interfered by many factors. 1948 C Mr. oulter to measure blood visible components using impedance principle, the measurement accuracy and correctness of the results has been a large degree of progress. But the impedance method can only measure the size of cells. In the 1980s, the principle of the laser method began to be used in blood analyzers, and the principle of combining the impedance method with the laser method was used to measure not only the size of cells but also the morphology of cell nuclei.
The instrument can use peroxidase to classify neutrophils and lymphocytes and basophils. At the same time, flow cytometry is used to count and classify reticulocytes. Using the difference in lipid content between naive cells and mature cell membranes and the difference in the amount of sulfided amino acid binding in the cell membrane, and the different protective ability of the cell membrane after adding a hemolytic agent, naive cells are classified.
2. Topology diagram of automatic blood analyzer
3. Product function introduction
1. The FET335XD core board adopts a 200 double-row pin connector design, which leads to most of the functions of the CPU, which is convenient for later debugging, production and maintenance;
2. Onboard 512MB DDR3 memory, 256MB SLC NandFlash storage;
3.6 UART, 2 CAN, 2 Gigabit Ethernet, 2 master-slave McSPI serial interface;
4.24-bit RGB data output, the highest resolution supports 1366*768, built-in SGX530 3D graphics acceleration engine;
5.Linux3.2+QT4.8.5 operating system, supporting YAFFS and UBI file system formats to ensure stable and reliable operation of the file system;