| With the popularization of science and technology and enhancement of people's safety consciousness, different trades put forward higher requirement to efficiency rate, reliability, safe nature, economy and its science etc in the process. During the science and technology stride, the oil industry is not exceptional. Strengthening the capability constantly and its safe performance index of petroleum equipment are put forward on the daily programme.As one part of ocean petroleum drilling equipments, marine workover rigs, which structure and performance are affected by the special work environment such as the odious environment: deep water, high wave, big wind and so on, is different greatly from that used in the land. Therefore, in order to understand work environment of workover rigs and detect its using performance and structure parameters, it is very helpful and meaningful to improve work reliability and structure optimal reliability design, reduce cost and avoid unnecessary accident. Using wind tunnel testing environment, the research is just to analysis maritime workover rigs model.The so-called wind-tunnel is one kind of equipments used to carry on air motive force experiment to the model in the special pipeline, with power equipment driving one strand of air current whose speed can be controlled.Relativity principle and similarity principle have been used in wind-tunnel design and trial.In view of this, based on analyzing well frame structure characteristic, marine environment, as well as wind-tunnel testing module preparation, experiment principle and characteristic, this thesis introduces one set of testing and control system developed specially for wind-tunnel trial of marine workover rigs.In the testing course, under the consideration of the structure and feature of researched object, in order to make the testing environments of marine workover rigs module similar to that of real marine and easy to be operated, keep simulated ocean wind speed direction in the wind tunnel unchangeable (adopting the system of the frequency conversion to adjust electrical machinery revolution speed and gain the wind load which dimension can be transferred), and let marine workover rigs module revolve at the set speed in the wind tunnel.By way of the above imitation hypothesis and corresponding design of scheme optimizing, this observing and controlling system can test correlation ability parameters and concerned wind-tunnel environment parameters ofmarine workover rigs derrick module. What's more, it can deal with and analyze the experimental data gotten and finally achieve the capability parameters of marine workover rigs derrick.In a word, on the foundation of synthetically applying branch theory knowledge such as Computer Control Technology, Sensor Technology, Automatic Control Theory, Electromotor Frequency Conversion Fast Technology, Dynamic Test Technology and Air Dynamics etc, by programming and finally debugging, this measurement and control system possesses the following characteristic:1. Developed especially for the wind tunnel testing module of marine workover rigs derrick;2. Using Visual Basic Software Visual Basic6.0 as its developing platform to implement on-line measurement. The man-machine interface of the whole testing software is pleasant. It can be operated conveniently and easily;3. According to modern detection theory, select appropriate sensors and make the testing of each parameter more accuracy, reliable, fast and satisfy the requirement of design task finally;4. Frequency conversion fast control system is used in the measurement and control system of marine workover rigs wind tunnel;5. Based on the requirement of computer measurement and control system, data acquiring boards are selected to perform the arranged measurement and control task;6. Because of using VB as its developing platform, the system designed is possessed of the following functions, such as static and dynamic testing, solo-tunnel data / curve real-time displaying, multi-tunnel data displa... |
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