Research On Micro Under-Well Intelligent Manometer And Thermometer

Temperature and pressure data are vital to design implement program during well oil exploitation. This dissertation designs intelligent pressure thermometer which based on PIC16F877. It aims at micro testing equipment construction and satisfies mass data memory, and it can also realize intelligent joint.Under well pressure thermometer uses patch piece A/D conversion PIC and I~2C buss to control, so it realizes micro construction and mass data memory. It utilizes FT245BM's function of converting automatically and exploits intelligent conversion joint of USB and I/O correspondence. After software exploitation, it can realize signal test , data collecting and memory, USB correspondence, data or curve displaying. Therefore, this dissertation launches following research:1. Connecting A/D, high precision instrument amplifier and silicon pressure sensor to be the smallest data collecting instrument; utilizing hardware joint of I~2C buss's instrument address , plugging several memories to buss line, and it settles mass data memory.2. Utilizing FT245BM's serial joint engine, FIFO controller and USB confer engine, designing PIC scheduling control hardware circuit of FT245BM, realizing automatically convert of USB and I/O, exploiting automatically identifying circuit of virtual serial port and external circuit.3. Designing control software of data memory, A/D conversion, USB correspondence and timepiece modular. Applying Visual C++6.0 serial correspondence program MSComm in upper PC to design display program of USB joint.4. Exploiting silicon pressure sensor's function of amplifying signal, collecting circuit, matching conversion signal of PIC A/D. At last, debugging system, and actual results are the same with virtual results, the system fulfill expected targets.Construction of testing system is compact, and it can apply to test rest pressure, flowing pressure and temperature. It is economical and reliable, and it's valuable to under well research and exploitation, especially to design and applying memory deep well system.