Dissertation > Excellent graduate degree dissertation topics show

Under Windows NT platform, engine data acquisition and analysis system

Author: SunLiang
Tutor: LiuBiao
School: Hunan University
Course: Power Machinery and Engineering
Keywords: unsteady operation conditions data acquisition multithreading technology indicator diagrams Windows NT loop buffer storage DMA DLL
CLC: TP274.2
Type: Master's thesis
Year: 2002
Downloads: 100
Quote: 3
Read: Download Dissertation

Abstract


In this paper, the author discussed the combustion data acquisition of internal-combustion engine in unsteady operation conditions under Windows NT system. It is a momentous attempt and improvement of data acquisition system compared to those formerly based on DOS, Windows 3.x and Windows 9.X. Taking the mighty function and the high degree of stability and reliability of Window NT into consideration, it is meaningful to explore the data acquisition system under such condition. In this paper, the data acquisition with high speed and great capacity was realized and a unique way of acquisition, memory and transmission was put forward: to form the loop buffer storage area to acquire and store data by two pieces of ordinary RAM and with the aid of DMA to transmit data, the data in the buffer storage area was sent into the main memory. Thus, the data acquisition was realized under Windows NT with high efficiency and speed; the problems of the rigid restriction such as the Windows NT could not directly visit the device port and interruptive vector were settled by the DLL mechanism of Windows. With the full application of multithreading technology and the advantage of NT in supporting the symmetrical multi-processor (SMP characteristics), the operating efficiency was greatly improved. As far as the experimental data is concerned and because of the characteristics of internal-combustion engine experiment, the clearance between moving components, linking passage of pressure transducer and crankshaft torsion angle will cause the dynamic top dot to deviate from the static top dot during the dynamic process. Moreover, because of the unavoidable existence of combustion pressure oscillations and pressure oscillations of gases in linking passage of transducers, there are a lot of errors in the original data. These factors are against the accurate evaluation of the working condition and performance of internal-combustion engines. In order to eliminate the influence caused by these errors, first, the author introduced the "five-time &four-dot simulation synthesize method" to amend the top dot position; and then the "seven-dot movement average method" was utilized to smooth the indicator diagrams with saw-tooth sharp waves. Thus a satisfactory effect was achieved.

Related Dissertations

  1. Design and Development of Application Programme for Fault Analyzer Based on Wince Platform,TP311.52
  2. Research on the Aiming Signal Processing of the Optical Probe Measurement System,TH74
  3. Research on Synchronous Acquisition and Processing System Detecting Defocus Signal Based on DSP,TH741
  4. Study of Automobile Ignition Coil Testing System Based on Standard LAH032.905,U472.9
  5. Research on High-Performance Computer I/O Bus,TP336
  6. Design of High-Speed Data Acqusition Board Based on Signal Integrity Analysis,TP274.2
  7. Development of 3-Dimensional Scanning Probe Data Acquisition System Based on DSP,TP274.2
  8. Development of Inductance Sensor Data Acquisition System Based on FPGA,TP274.2
  9. A Communication Board Development Based on LVDS Technology,TP273
  10. A High-Speed Data Acquisition System Based on USB2.0,TP274.2
  11. A High-Speed and Real-Time Data Acquisition System Based on FPGA,TP274.2
  12. Research of Acoustic Signal Acquisition System Based on DSP,TP274.2
  13. The Principle Research and Implement of the Acoustic Keyboard for Computer,TP334.23
  14. Research on the Down-hole Data Sampling and Transmission Method,TE938
  15. Research of DSP-based Real-time Demodulation Method of One-frequency Laser Interferometer,TN911.3
  16. Soccer Data Acquisition System,TP212.9;TP274.2
  17. F enterprises with RFID data capture products to improve i Research and Application,TP274.2
  18. Web-based scientific computing legacy application sharing technology research,TP393.09
  19. Design of Analysis System of Audio Signals Based on Virtual Instrument,TP274
  20. Hardware Implementation of Block Ciphers Algorithm Based on Petri Net,TN918.2
  21. Design and Implementation of Hydrological Information Automatic Monitoring System,P335

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