Research On LRQ₂ Measuring Instrument On-line

Locomotive indicator exact measuring is directly related to the safety of motorcycle transportation. The function of Locomotive indicator is automatically reflecting the front signals on ground and denoting motormans to operate Locomotive. There are inductors on Locomotive and orbital circuit, Locomotive inductor receive the railway ground signals for controlling, then decoded to engineer's indicator which display the same signals as front ground signals. Recently, Chinese the technology development of Locomotive indicator mostly focus on MCU universal Locomotive indicator, has achieved automatic measurement of the instrument, independently deal the data analysis which can make instrument get more precision, more credibility and more stability, ensure that railage could safely progress.The subject advanced a design method of multifunctional engineer online measurement instrument, measure engineer's online operating state, provides forceful evidence for troubles analysis. The text towards every property parameters of locomotive inductor, synthesized methods of voltage and inductance measurement all the country in the world, made a further research on both inductance value and quality factor measurement methods, through experiment comparing proved reliability and feasibility of this measurement method, and expatiated theory model, principle, technology, hardware as with as soltware designs of instrument.This subject build a hardware circuit with an pic16f877a monolithic integrated circuits as the central processor, developed the portable Locomotives measurement instrument online. This hardware circuit of system simple, measuring speed, small volume, light weight, portable, convenient operation. Hardware part include the electricity voltage, the sense and quality factor, the direct resistance, besides, voltage gathering, signal processing and serial expand storage, keyboard, the lcd display and serial ports to usb data transmission. System software design are pic system programming and upper machine application development as two part. In the maplab ide developing environment, we can use C language program develop a system gathering, processing, storage, communication and other relevant procedures, with stored in the serial storage of data upload to the upper displayed by the user interface. Upper machine(pc)users interface based on board, the engine, staff number and other items to query the specific datas, can show the transmission data of measuring system, and query datas, building the reporting and print by different types.The debug and test results indicate that the stability, precision and the overall indicators of the instrument achieve to all the technical requirements, meet the demand.