基于FPGA的自动加样器设计与实现

发布时间：2018-05-30 17:07

本文选题：全自动 + 加样器　；参考：《重庆大学》2015年硕士论文

【摘要】：近年来,生化检测和医药生产标准不断提高;同时人们对医疗资源和服务的需求越来越大。医院、医药研制和监管单位等机构需要大量的高精度全自动加样器。而我国自动化加样设备研发起步较晚,国产全自动加样器较少且性能较差。目前,大医院基本都使用国外进口全自动加样器,其加样精准快速,用户操作方便,但价格昂贵;基层医院和小型机构大多仍使用手工加样工具或仪器。因此,研制一套低成本、高可靠性、高性能且操作简单的自动加样器十分必要,具有较大社会意义和经济价值。课题以Altera公司的DE2开发板为核心控制器,Android手机为无线遥控端,结合液位传感器和位置传感器,合理有序控制泵阀和各步进电机,设计了一种基于FPGA的自动加样器。课题主要工作有硬件电路设计、FPGA核心控制器和Android无线遥控器设计。其中,核心控制器采用了SOPC嵌入式系统设计,包括SOPC系统搭建和主控制器软件设计。系统通过电机控制逻辑模块和驱动电路实现步进电机S型调速控制和细分驱动,使得各机械臂的运动快速平稳;系统采用电容式液位探测方法,通过液位探测逻辑模块和探测电路处理液位传感器信号,可精准探测到液位,防止加样针空吸或扎入试剂太深而引起污染;Nios II主控制软件采用状态机方式实现系统各部件有序配合完成全自动工作;Android控制软件操作简单,用户可无线遥控和监视加样器,使研究者和检验人员远离强酸、强碱等腐蚀性或有毒试剂。经反复测试验证可知,自动加样器实现了仪器自检、全自动加样、保养清洗、无线遥控与监视等功能,电机运动平稳流畅、液位探测精确、加样准确且误差较小,达到预期目标。
[Abstract]:In recent years, biochemical testing and pharmaceutical production standards have been improved, at the same time, the demand for medical resources and services is increasing. Hospitals, pharmaceutical development and regulatory institutions need a large number of high-precision automatic samplers. However, the research and development of automatic sampling equipment in our country started late, and the domestic automatic samplers are less and the performance is poor. At present, large hospitals basically use imported automatic samplers, which are accurate, rapid, easy to operate, but expensive. Most primary hospitals and small institutions still use manual sampling tools or instruments. Therefore, it is necessary to develop a set of automatic sampler with low cost, high reliability, high performance and simple operation, which is of great social significance and economic value. Taking the DE2 development board of Altera company as the core controller and the mobile phone as the wireless remote control terminal, combining the liquid level sensor and the position sensor, the pump valve and every step motor are controlled reasonably and orderly, and a kind of automatic sampler based on FPGA is designed. The main work includes hardware circuit design, FPGA core controller and Android wireless remote controller design. Among them, the core controller adopts SOPC embedded system design, including SOPC system construction and main controller software design. The system realizes the step motor s speed regulation control and subdivision drive by motor control logic module and drive circuit, which makes the movement of each manipulator fast and stable. The system adopts capacitive liquid level detection method. The liquid level can be accurately detected by processing the liquid level sensor signal through the liquid level detection logic module and detection circuit. The main control software of Nios II uses state machine to realize the automatic operation of all parts of the system. The Android control software is easy to operate, and users can control and monitor the sampler wirelessly. Keep researchers and inspectors away from corrosive or toxic reagents such as strong acids and bases. After repeated test and verification, the automatic sampler realizes the functions of instrument self-test, automatic sampling, maintenance and cleaning, wireless remote control and monitoring. The motor moves smoothly and smoothly, the liquid level detection is accurate, the sample addition is accurate and the error is small. Achieve the desired goal.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH789

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