Dissertation > Excellent graduate degree dissertation topics show

Research on Improved Phase-shift Laser Range Finder

Author: CaiYuZuo
Tutor: LiaoPing
School: Central South University
Course: Mechanical Engineering
Keywords: laser range measurement phase-shift laser modulationdifference-frequency Fast Fourier Transform
CLC: TP212
Type: Master's thesis
Year: 2013
Downloads: 29
Quote: 0
Read: Download Dissertation

Abstract


A laser range sensor used to obstacle detection in construction machinery is designed. The phase-shift laser range is applied to the system, and the method includes dual-frequency modulation, difference-frequency, Fast Fourier Transform (FFT) and so on. The hardware detection circuit and program of laser range are completed, and some improved circuits and slip average method are applied. Besides, the cause of error is discussed. The whole detection circuits have the advantages of high integration and simpleness. The ranging accuracy has reached centimeter magnitude. The research includes these following sections:1. Commonly used methods of range are analyzed, and the phase-shift laser range is chose to detect obstacles. According to method and requirement of the ranging system, overall measurement solutions are determined.2. According to the power equation and error analysis of phase-shift laser ranging system, the feasibility of range sensor without cooperation target to achieve the target range and accuracy is demonstrated.3. According to the measurement program, the laser modulation and transmitter circuit, the laser receiver circuit, the measurement circuit of phase and communication circuit are designed. The waveforms and the key parameters are analyzed, and appropriate chips and circuits are selected to achieve ranging.4. The method based on difference-frequency and FFT is used to measure the phase-shift between transmitter and receiver. The program of controlling Direct Digital Synthesizer (DDS), controlling analog switches, A/D acquisition, data processing, and CAN bus communication are written. In order to improve the accuracy of phase measurement, the method of silding is used to get the average value.5. The experiment of phase measurement based on FFT is finished. The experiment of range measurement is finished. The data of measurement is analyzed.

Related Dissertations

  1. Guide heliocentric orbit simulation Research and Improvement,O53
  2. Optical Hilbert Transform Based on Fiber Bragg Gratings,TN253
  3. Research about Power Quality Monitoring System Based on Embedded Technology,TM76
  4. Research and Implementation of 3kW High Power Factor DC/DC Converter,TM46
  5. Research on the 24V DC Converter of the Self-power System,TM46
  6. Research and Design of Electronic Equalization Based on Most Likelihood Sequence Estimation,TN911.5
  7. Phase Shift Adjustment and Optimization for Miniature Pulse Tube Cryocooler,TB651
  8. Destriping of TDI-CCD Remote Sensing Image,TP391.41
  9. Research on Heterodyne Detection Applied to Brillouin Temperature Sensing,TN253
  10. Electronic Voltage Transformers and the Harmonic Voltage Measurements,TM451
  11. Ozone generator power inverter Research and Design,TM464
  12. Based on Windows and Interpolated FFT power harmonic detection technology,TM935
  13. Image intensifier and a screen resolution of defect detection technology,TN144
  14. Boost -type isolation transformer with a three-level converter research,TM46
  15. The Break-bar Fault Diagnostics of the Asynchronous Motors Based on Variable Frequency Drives,TM343
  16. Design and Research of Ultrasonic Gas Leak Detector Based on Embedded System,TP274.53
  17. The Periodic Boundary of Space Impact of the Uniformity in Dielectric Barrier Discharge,O461
  18. Study on Chaos Control for Dual-Ring Erbium-Doped Fiber Laser,TN248
  19. Research on Key Technologies of Inductive Coupled Power Transfer System,TM46
  20. Research of Input Rectifier Topologies for Welding Inverter Power,TM461
  21. Development of the Motor Power Quality Analyzer,TM301.3

CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor
© 2012 www.DissertationTopic.Net  Mobile