Research of Insulated Tubing Vacuum Test

注蒸汽采油是开采稠油的重要手段。隔热油管的真空度影响其隔热性能，从而影响注蒸汽采油的开采效果，因此，如何测试油管真空度是注蒸汽采油的重要研究方向。本项目以电容式微型真空传感器为测试单元，借助PZT压电晶体模块在其共振频率下的逆压电效应，结合PIC16F876A单片机及相关外围信号处理电路，从而测试隔热油管的真空度。就此，本文主要开展了以下研究工作： 1.对影响油管隔热性能的导热、对流、辐射等因素进行分析，确定对流是影响散热的主要因素、真空度是油管隔热性能高低的主要指标。根据油管结构的封闭特性，设计整体测试方案。 2.针对电容式微型真空传感器测得的电容值比寄生旁路电容小几个数量级的情况，采用...Steam process oil extraction was the vital method of thick oil exploitation. The vacuum level of insulated tubing affected heat insulation capability, and then affected the exploit effect of steam process oil extraction. Therefore, how to test the vacuum level of oil pipeline is the important research direction of steam process oil extraction. In the project, we used capacity vacuum micro sensor a...学位：工学硕士院系专业：物理与机电工程学院机电工程系_机械制造及其自动化学号：20042902

A Flux Control System Based on Single Chip

介绍一种以PIC16F876为核心的流量控制系统,通过单片机与计算机通讯,实现远距离的自动控制,控制系统经使用效果良好。文章给出了系统设计原理、单片机程序流程图和硬件电路。This paper presents a flux control system based on the single chip PIC16F876.The system realizes the long distance auto control by the communication between single chip and computer.The result has been proved to be good.The design principle of the system,flow chart of single chip and the related circuits are introduced in detail

Application Research in Production of Vacuum Insulation Panel with Electric Capacity Micro-vacuum Sensor

介绍一种基于电容式微型真空传感器的真空度检测系统。系统利用PIC系列单片机对真空绝热板真空度进行实时测量,试验数据表明精度可达10-2Pa,完全满足测量的要求。The paper introduced a vacuum measurement system,which was based on the capacitance micro-vacuum sensor.This system used PIC series microcontroller unit carried on the real-time measurement to the vacuum degree of the vacuum insulation panel.According to the date of our experiments,the precision of the measure of vacuum d-egree can reach to 10-2 Pa,and it satisfies the measurement perfectly

Remote flow control system for water flooding in oil field

介绍一种以PIC单片机为核心,结合LWLZ系列涡流式流量计与IKZL智能型直行程电动机的油田注水流量控制系统,用MAX232连接PIC和PC或者运用GPRS模块,实现了远距离自动控制,解决了人工注水精度差、注水量调节难度大、注入水倒流、地层出砂等问题,并在硬件与软件两方面开发出系统人机交换界面,使用效果良好。The paper introduces a remote flow control system for water flooding in oil field based on PIC single chip,LWLZ whirlpool flowmeter and IKZL intelligent linear motion actuator.The long distance auto control realizes by connecting PIC and PC with MAX232 or using GPRS module,solving such problems:the low precision in artificial water flooding,hard to accommodate the amount of flooding,flooding flow backwards and formation sanding.System man-machine conversation program is developed and the result has been proved to be good

The Examination Of So_4~(2-) In The Water Sample Of Oil Field By Potential Titration

阐述了电位滴定法检测油田水样中的SO42-的原理、实验条件及操作步骤,分析了操作过程中影响准确性的因素,并且根据实验需要设计了一个高阻抗放大器电路,可测试的最低浓度达到1mg/l左右。Expatiate the theory, experiment condition and operation process that examine SO42 in the water sample of oil field by potential titration. Analyze the factor that will affect the veracity in operation process. Design a high-impedance amplifier based on the demand of experiment. The lowest concentration that can be examined is about 1mg/l

The Principle And Applications Of ADXRS Angular Rate Sensing Gyroscope

介绍ADXRS角速度检测陀螺仪的原理和电路结构,具体描述该陀螺仪外围电路的连接方法。为了使用ADXRS角速度陀螺仪测量角度,设计一种对角速度积分的方法,实现对角度的测量。阐述实验过程中硬件和软件的设计过程。实验结果表明:该实验方法能较准确的测量物体旋转的角度。The principle and the block diagram of ADXRS angular rate sensing gyroscope are introduced, and the external circuit of this gyro is described in detail. In order to measure angle with ADXRS gyroscope, a method of angular rate integral is designed. The design of hardware and software in this experiment is expatiated. The result reveals that this method of experiment can measure angle accurately