Dissertation > Excellent graduate degree dissertation topics show

Ice Layer Thickness Measurement System Based on the Capacitance Difference of Air、Water、Ice

Author: GuoHongLiang
Tutor: QinJianMin
School: Taiyuan University of Technology
Course: Detection Technology and Automation
Keywords: Capacitive sensor Signal Conditioning SCM GPRS
CLC: TP274
Type: Master's thesis
Year: 2007
Downloads: 186
Quote: 2
Read: Download Dissertation

Abstract


In recent years, the large polar ice and the inland plateau glacier ablation magnitude, northern China, rivers, river there are varying degrees of ice flood problem. To understand the occurrence of melting glaciers and ice, it can not be separated from the measurement of ice thickness. In view of this paper proposes the use of air, ice, water capacitance between the new method to measure the ice thickness. Analyzed through a large number of experimental results found that on the order of magnitude difference in the three capacitance value can be measured capacitance value conversion for the frequency or digital signals, due to differences on the order of magnitude of the capacitance value, then the sensor-by-point measurements, if there the hopping of the frequency or digital signal, it shows the measured medium by a becomes another. Measured twice this transition, you can tell the ice on the interface and the next interface, the difference between the upper and lower interfaces is the ice thickness. Below is a summary of the design of the entire system. In this article introduces the structure of the capacitive sensor to measure the ice thickness, capacitance converted into a frequency signal or digital signal conditioning circuits, display and processing of the data processing circuit and PC. Capacitive sensor structure is a plate capacitor by a plurality of groups of spaced and arranged in accordance with such composition, the internal design of the gating circuit for each capacitor. The signal conditioning circuit design three conditioning ways: one is to use a dedicated chip AD7745 capacitance directly converted to 24-bit digital signal; other two using a different oscillation circuit capacitor to the frequency conversion. Signal conditioning circuit also completed the to accept collection instructions for data collection and to send the collected data to the data processing circuit. Data processing circuit is a microcontroller as the core clock, storage, and communications circuits. The clock circuit not only provides real-time measurements of the time, and produce one minute interrupt signal for the microcontroller to the signal conditioning circuit hair collection instructions. As the data transmission may be lost, or transmission errors, also the possible host computer does not receive data in real time, so the design of the storage data circuits for future data tested additionally. Display handler in the host computer, including data storage, data analysis, processing and display of experimental data derived ice thickness. Communications are mainly three ways: The first way is to use the serial port and PC communication, data transmission suitable for close; The second way is to take advantage of RS232 to CAN bus remote data transmission and sensor networking control; third The way is through the GPRS / GSM module data Remote.

Related Dissertations

  1. Research on Photo-Electric System of Rotating Shaft Radial Runout and Rotary Speed Real-Time Measurement,TH822
  2. Study on the Locomotive Dynamic Supervision System,U284.48
  3. Real-Time Power-Stealing Monitoring and Arrear Management System,TM73
  4. The Technologies for Interoperability of Heterogeneous Enterprise Applications and Their Application in Material SCM,TP311.52
  5. Methane Concentration Detecting Instrument Based on Infrared Absorption Theory,TP216
  6. Control System of Rotary Drying for Flake Agricultural Materials,S226.6
  7. Intrusion detection based on the ultrasonic echo envelope in the military security patrols,E919
  8. Expression of Caspase-4 and Caspase-3 Gene Related Apoptosis in Pathological Changes of Sternocleidomastoid of Congenital Muscular Torticollis and Four Years Clinical Followed-up for Opereated Patients,R726.8
  9. CAN bus technology in the meteorological monitoring System Research and Implementation,P409
  10. Design and Implementation of Hydrological Information Automatic Monitoring System,P335
  11. The Research of Embeded Security Systems Based on ARM & Linux,TP277
  12. ECos and the ARM7 sewage line monitoring transmission terminal - based Design and Implementation,TP311.52
  13. Software Approach to Implement Power Optimization in Embedded Handheld Mobile Gis Device,TP311.52
  14. Design and Implementation of a unit of military vehicle dynamic management and monitoring system,TP311.52
  15. Study on Tightness and Networked Port Technology for Capacitive Pressure Transmitter,TP212
  16. GPRS network meter reading system based on the Wireless CPU,TN929.5
  17. The Design of Vehicle Monitoring Terminal Based on Mobile Communication Network,TN929.5
  18. The Design and Implementation of GPS vehicle monitoring system of transportation services,TN967.1
  19. A Design of Human Balance Monitoring System Based on Embedded Linux,TP274
  20. Automatically Big Module Gear Chamfering Machine Design Based on ADAMS,TG61
  21. Load monitor on-site testing equipment design,TM76

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