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Study on Wheel/Rail Profilometers Based on the Smartphone

Author: MaJinLing
Tutor: ZhouWenXiang
School: Southwest Jiaotong University
Course: Precision instruments and machinery
Keywords: HMI Smartphone Wheel profile measuring instrument Equivalent conicity
CLC: TN929.53
Type: Master's thesis
Year: 2011
Downloads: 45
Quote: 1
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Abstract


Smart meter is a measuring instrument containing micro-processor ( or system ) , in recent years, using a PDA or smartphone as a data processing system, in terms of portability has made considerable progress. However, due to various reasons, deep in the human-machine interface , and data processing and other aspects of some shortcomings , this thesis portable wheel-rail instrumentation research carried out as follows : First , study the current development of smart phones , the 2010 smart phone hardware resources (CPU clocked at 1GHz, 3MB cache, memory RAM488MB ROM512MB), and 1996 has been quite a PC ; their software resources can meet the needs of the intelligent instrument ; therefore , smart phones , and can provide if Bluetooth or WIFI Interface sensors ( or data acquisition subsystem ) combine to form a complete they can carry smart instrument or system . Second, for the wheel profile measuring instrument software design research , through a detailed analysis of user needs that software to wheel and rail profile has the following characteristics : rapid measurement and calculation , on a larger scale in the interface shows the measured curve , easy to measure staff judgment ; live view historical data. In contrast to the system of data management file management and database management advantages and disadvantages of two ways , the results show that for the wheel profile measuring instrument , the use of file management is more reasonable. Again, in the content on the equivalent conicity in-depth study and calculation method , based on the establishment of a reliable algorithm for equivalent conicity . Through translation, the difference between wheel and rail and other methods of data placed in the same coordinate system , circulatory find the minimum distance between wheel and rail value method using the cumulative increase in the base roll angle , obtained at the wheel -rail contact point of the radius , thus traverse the amount calculated under different values ??of equivalent conicity . Application of the above findings , the preparation of a complete software, clocked at 624MHz, Windows CE operating system for smart phones running on the test results showed that: wheel and rail profile measuring instrument software system adds new browsing history data function ; more importantly, can be obtained within 5 seconds equivalent conicity values. Extensive tests have shown instrument software designed to run in no crashes , slow , memory leaks and other phenomena .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications > Cellular mobile communications systems (mobile phones, mobile phone handsets )
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