Research On Multi-point Concentrated Fixed Measurement Inclinometer

Fixed inclinometer as essential civil construction precision measurement instruments, has been widely used in excavation, hydroelectric dams, slope, geological prospecting and other geotechnical engineering. Current domestic production of inclinometer systems, due to the automation level, collection efficiency, and can no longer good to meet the actual needs of the construction in inclinometer, while import Inclinometer system is too expensive and high maintenance costs.To improve the fixed inclinometer data collection efficiency, the automation level. In this paper, developed high-precision angle sensor based on multi-point focus system fixed inclinometer.Through the tilt sensor output signal, and combined with a fixed horizontal displacement measuring inclinometer features, and in order to make inclinometer system has good man-machine interface system also meets the requirements of speed and accuracy, the system uses master-slave control structure. Host computer (host) for the computer and lower computer (from the machine / acquisition module) to high-performance P89C PHILIPS MCU as the core of the main control chip, and includes the input module, A/D converter module, communication module and other modules. Modular circuit design reduces the cost of system maintenance and development, to facilitate system maintenance and follow-up of upgrades. For system multi-point data sampling system, host computer and lower computer composed by RS-485 bus, the number acquisition module based on the needs of practical use to connect to up to 64, each acquisition module can connect up to 8 angle sensor, so the system via RS-485 bus expansion, you can also capture 512 fixed-point data, greatly improved the efficiency of data collection. While a computer can simultaneously monitor multiple machines from working under state and control ,increased automation of data collection.And each data acquisition module can be separately collected, convenient operation. In order to achieve high precision design requirements, system design using high-precision angle sensor and 24Bit the A/D converter, and through the circuit and procedures designed to protect the system accuracy requirement.Computer monitoring data processing system is the inclinometer an important part of the system. In this paper, Delphi7.0 as the computer software development platform, interface, easy operation and friendship. The preparation of serial communication using MSComm control procedures, will collect the data acquisition module sent to the computer to display and analysis, while the computer sends control parameters to the acquisition module.Finally, through system testing, the results show that the design of multi-point focus on a fixed hardware design Inclinometer reliable and stable software, easy to use, to achieve the desired design.