Papers by Author: Ming Qin

Abstract: Currently most of our oil fields have entered the extra high water cut stage. Accurate prediction of field development dynamic is the foundation of the reasonable, efficient, sustainable oil field development. Prediction of oilfield development index have varieties of methods ,including the law of diminishing water flooding Union law solution, yield component method, multiple regression and so on. In this paper, we take xingnan development zone eight to twelve district extension well network development index prediction as an example, introduces the application of multiple regression method in the prediction of reservoir indicator.

Abstract: An ultrasonic anemometer using TDC-GP2 high-accuracy time measuring chip is studied in this paper, the design of software and hardware parts and principle of flying time measurement using TDC-GP2 chip are also discussed in detail. Under this scheme, a prototype has been fabricated, with simpler circuit architecture. A wind tunnel experiment of the prototype was conducted, the test result shows that the ultrasonic anemometer can measure wind speed up to 39.9m/s, and the measurement error does not exceed 0.3m/s when wind speed is below 10m/s, or 3 percentage when its above 10m/s. Wind directions vary from 0 to 359 degree can be detected with accuracy of 3 degree.

Abstract: A design and simulation of a fully CMOS compatible micromachined multilayer cantilevers-based environmental thermometer are presented. The operation principle of the structure is depending on the mismatch effect of thermal expansion coefficient and the piezoresistive effect of polysilicon in CMOS process. Upon temperature variation, the deformation of the multilayer cantilever resulted from the large thermal expansion coefficient mismatch of different materials can be sensed and translated to an electrical voltage output by using a symmetric piezoresistive Wheatstone bridge. The mechanical characteristics of the device are analyzed with the extension of bi-layer Timoshenko model and the output of the read-out circuit is also simulated. The calculation and simulation show that the device with bi-direction deformation may have wide temperature range from -100 to 100°C and sensitivity about 0.15mV/°C, which fit the demand of radiosonde for environmental temperature measurement. This sensor may also have other favorable features, such as micro size, low-cost due to its working principle and compatibility with commercial CMOS process.