Design And Development Of Mobile Instrument For Accurate Tank Liquid Level Measuring

The development and application of mobile instrument for accurate tank liquid level measuring can reduces artificial participation. It needs little artificial participation than the traditional measurement methods. This method can enhance the measurement accuracy greatly. That it not only reduces the labor intensity, avoids the occurrence of certain hazardous work, but also reduces the oil safety management loopholes in the system. The device can support optimized the management system in largest extent and thoroughly intercepts the tanker stolen events.It is a key step that the accuracy of oil measurement in the oil unloading process. The measurement methods of oil volume between loading and unloading general is different. And in the process of transportation, due to the sloshing of the vehicle, oil flow friction heating up,the volume of oil will be more significant increase. It results in the uncertainty of the oil measurement factors. So it is urgent for mobile tank level measuring instrument. The instrument can detect the oil volume data of tanker before and after transportation.In view of the current measurement and control technology, it develops in new, high reliability and maturity. This design has favorable conditions. Embedded system has been widely used in the field of measurement, control and the development of programmable technology, it provides a favorable condition for signal acquisition and processing. It has a abundant of data interface, flexible and convenient to storage and output data,. Through the preset program, it measures the liquid level of the oil tanker. Through the serial port of connected peripheral equipment, it measures the data of real-time transmission or storage of continuous. It is convenient to monitor or inquiry tank liquid level data, which provide convenient for data docking and makes reports automation is easy to realize. In this paper, it introduces the background and the status in the development and design process of the instrument. So it gets the important of the development significance of this instrument. The key technologies of the instrument development are introduced. They include the electromagnetic sensor, embedded microprocessor, attitude sensor, temperature sensor and HART protocol. The hardware of the system is designed, they also include the signal processing system and the HART interface. In the process of the instrument implementation,they are the concrete design of liquid level, the oil tank volume model and external data interface etc.At present, the precision measuring instrument of mobile tank has been applied The application of the instrument has a very positive meaning to the automatic control level of the tank car and the improvement of the accuracy of the measurement.