基于3D自动进样器的自动稀释系统设计

Design of Automatic Dilution System Based on 3D Autosampler

摘要:

如今自动进样器已经大量应用于分析用仪器设备中。为简化操作、提高稀释精度，在传统进样器基础上，设计了一种基于3D进样器的自动稀释控制系统。对进样器三轴联动定位技术进行补偿优化，减少样品瓶的定位误差，增强针架起停的稳定性和定位的精度。添加自动排空、开机自检功能，减少样品杂质污染；通过485与离子色谱仪等专用分析仪器实现联机通讯，实时反映仪器状态。添加自动稀释功能，对注射泵吸取待测液体积添加误差补偿优化，使稀释数据更加准确。自动进样器降低人力投入和维护成本。实际工作环境的测试表明，该系统具有良好的稳定性，色谱仪测试阴离子配置线性结果r值可以提高到0.999以上，效果良好，符合设计要求。

Abstract:

Autosamplers are now widely used in analytical instruments. In order to simplify the operation and improve the dilution accuracy, an automatic dilution control system based on a 3D sampler was designed based on the traditional sampler. The three-axis linkage positioning technology of the sampler is compensated and optimized to reduce the positioning error of the sample vial, and enhance the stability of the start and stop of the needle holder and the positioning accuracy. Add auto-empty, power-on self-test function to reduce sample impurity contamination; 485 communicates with dedicated analytical instruments such as ion chromatographs to realize online communication and reflect instrument status in real time Add automatic dilution function, add error compensation algorithm to the volume of liquid to be tested by the syringe pump, and make the dilution data more accurate. Autosampler reduces labor costs and maintenance costs. The chromatograph test shows that the linear value of the anion configuration can increase the r value to above 0.999. The effect is good and meets the design requirements.