Dissertation > Excellent graduate degree dissertation topics show

The Real-Time Detection System of On-line Chromatograph

Author: LiJia
Tutor: MaHongZhao
School: Zhejiang University
Course: Chemical Engineering
Keywords: on-line chromatograph auto injection differential pressure control quantitative analysis
CLC: TP274
Type: Master's thesis
Year: 2012
Downloads: 17
Quote: 0
Read: Download Dissertation

Abstract


Gas chromatography (GC) is a common method of chemical analysis now. It has the advantage of wide measuring range, fast analysis speed and good stability, so it is widely used in many fields. But traditional detection method usually lags behind the experimental process, this makes it difficult to achieve the optimization control. There is an urgent need for the modern laboratory to change from the original off-line mode to online mode.This paper designed a real-time inspecting system of on-line chromatograph based on the research of Gas chromatography. It included two parts:hardware design and software design. The core of hardware was the automatic liquid injector. Since the on-line Gas chromatograph could only achieve the auto injection of gas before, it achieved the auto injection of micro-liquid by the principle of differential pressure control. What’s more, we developed a parallel system of columns through changing the construction of Gas chromatography to increase the detection efficiency. The software was designed for this system by VB language. It achieved the communication of software and S7-200PLC through OPC (OLE for Process Control), realized the function of hardware automatic control. By evaluating various filtering algorithms and peak identification algorithms, we chose the moving average filtering algorithm to filter the chromatographic data, and a deformation algorithm based on the first derivation to distinguish peaks. The software workstation also provided users a simple and friendly work interface, which made it very convenient for users to operate.The experiments shows that the on-line chromatograph is convenient to use and of high reliability, can achieve the requirements of real-time analysis.

Related Dissertations

  1. Quantitative Analysis of Pyrolysis Component of Typical Low Volatile Coal of Chinese,TQ530.2
  2. A Quantitative Study of Grafts Angiogenesis after Anterior Cruciate Ligamen Reconstruction with Preservation of the Remnant in Rabbit Model,R687.2
  3. Yellow phosphorus storage tank area of Safety Evaluation,TQ126.317
  4. Study on the Green Synthesis of Melatonin,R914
  5. Qinshui Basin Carboniferous - Permian coal-bearing strata of free gas reservoir type more quantitative analysis of dependencies,P618.13
  6. Quantitative analysis of acoustic tissue palpation techniques in patients with chronic kidney disease staging clinical application,R692
  7. Infrared spectroscopy surfactant aqueous two- phase system of,O647.2
  8. Application Study on Quantitative Analysis of Diffusion-weighted Imaging and Dynamic Contrast-enhanced MRI in Thediagnosis of Breast Lesions,R445.2
  9. China Real Estate Price Influencing Factors,F224
  10. Development and Application of Fault Tree Analysis Computer Aided System,TH165.3
  11. Diagnosis of Hepatic Tumors and the Relationship of the Mode of the Contrast-enhanced Ultrasound and the Generation of the Tumor Vessel,R735.7
  12. Comparative Research of Kinship Terms of Hakka and Gan Dialects,H17
  13. Clinic Values of MRI Quantitative Analyze in Bone Erosions in Rheumatoid Arthritis Patients,R593.22
  14. Intermediate stage of Chinese spoken fluency Investigation and Analysis,H195
  15. Extraction, Purification, Antioxidation Activity and Stability of Red Pigment from Mulberries,TS264.4
  16. Research on ICT-integrated Instructional Design for Technology Supported Classroom,G434
  17. Research on Experimental System for Hovering Control of Submarine,TP273
  18. Quantitative Analysis of Landscape Pattern and Assessment of Ecological Security of Hefei City,Q149
  19. Studies on the Secondary Metabolites of Aspergillus Oryzae,Q936
  20. The Comparative Research of Clothing Brand Evolution between China and Italy,F426.86
  21. Study on the Main Impurities in the Technical S-Triazine Herbicides,TQ457.24

CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system
© 2012 www.DissertationTopic.Net  Mobile