The Measurement And Control Technology And Software Development Of The Platelet Function Analyzer In Discrete Mode

Discrete analysis system is widely used in various industries due to its modular structure design,simple and fast detection process,and accurate and consistent detection results.In order to meet the growing demand for in vitro diagnosis of platelets,the development of rapid and accurate platelet testing instrument for large quantities of samples is discussed,the design and implementation of the measurement and control technology and system software of the platelet function analyzer in discrete mode are presented in this dissertation.The new analyzer is designed by turntable structure and optical turbidimetric method with contactless measurement characteristics,which can realize the detection of discrete data in the continuous motion of up to 40 samples in a single detection task,and the detection efficiency of the instrument is greatly improved.The analyzer is composed of management module and control module,the management module is mainly responsible for operation and data management,human-computer interaction and other functions.The control module is mainly responsible for the execution of the test program with adjustable parameters,including the staged centrifugation of the whole blood sample,the inertia mixing of samples and reagents,the flow control detection of moving samples,the constant temperature control of the whole process,etc.Based on the introduction of the key technology of the discrete analysis system and platelet function detection,the whole test scheme of the analyzer with adjustable parameters is presented firstly.Then,a motion measurement model is established for discrete data detection of moving samples,and a flow control detection scheme is designed and implemented,which can significantly improve detection speed and accuracy.The scheme is divided into three stages;In the positioning stage,positioning deviation compensation and positioning tolerance design are used to ensure accurate and fast positioning;In the sampling stage,the discrete detection frequency is set and invalid sampling points are eliminated to ensure the accuracy of the detection data;In the data processing stage,the final detection value is calculated through the sampling distribution model and filtering algorithm.On this foundation,a stable and reliable analyzer communication and control software scheme is presented.In accordance with the realtime requirements of the flow control detection scheme,the real-time operating system is introduced.According to H.Gomaa Principles and relevant experience,the software of the control system is decomposed into multiple task modules.The stability and reliability of the flow control detection scheme is ensured with the reasonable multi-task synchronization mechanism and program design which ensures the time determinism at software level.In response to the need for subsequent modular upgrades of the instrument,a distributed communication management system for multi-node data transmission is designed by the publish-subscribe which has loose coupling characteristics and the scalability of the analyzer communication system is improved.Finally,a complete and reasonable test and evaluation scheme for the software and hardware functions of the instrument is designed to verify the high efficiency of the measurement and control technology and the reliability of the system software of the new platelet function analyzer.