【作者】 寇雪芹；

【导师】 师帅兵；

【作者基本信息】 西北农林科技大学 ， 农业机械化工程， 2003， 硕士

【摘要】 柴油机喷油泵性能的好坏直接决定着柴油机的动力性、经济性及排放。喷油泵试验台是各汽车及其柴油机制造和修理厂研制、生产、检验、调整喷油泵不可缺少的设备。 6PSD30-1型电子控制喷油泵试验台是七十年代的产品，其电气控制部分电路采用大量分立元件构成，测试灵敏度低，设定调整不方便，故障率高，而且电路元件大多老化、损坏，现处于闲置状态。利用单片机结合自动控制技术设计一套控制系统，对其进行技术改造，实现试验台量油时对其喷油次数预置、计数、显示，计满后自动停止；主轴转速预置、测速、调速、显示。从而使电子控制喷油泵试验台改造成为智能型喷油泵试验台。 系统采用模块化设计，以8031单片机为核心，分为喷油计数模块和主轴转速模块两个大模块。喷油计数模块设计又分为喷油计数模块硬件设计和喷油计数模块软件设计；主轴转速模块设计又分为测速模块软、硬件设计和调速模块软、硬件设计。 系统组成结构由8031单片机、信号检测(计数传感器和测速传感器)、电气接口(放大整形电路、驱动接口、继电器接口、8155并行I／O接口、8279键盘显示器接口和D／A转换接口)、执行机构(电磁铁和电机)组成。 硬件设计在8031单片机最小化应用系统基础上外接设备包括8155、8279和DAC0832以及传感检测器、功率驱动接口、执行机构构成一个控制系统。硬件由少量电子器件组成。 软件设计采用模块化设计方法，整个程序由主程序、喷油计数模块程序、主轴转速模块程序组成。软件采用MCS-51汇编语言进行编程。 改造后的试验台可以自动控制喷油计数、主轴转速且数显。与原试验台比较，省去由大量分立元件组成的单元环节，减少焊接点，大大提高工作可靠性、检测自动化程度、检测精度和效率，使用、维护和修理方便。有一定的现实意义，比较适合现阶段国情，又顺应目前自动化程度要求提高的潮流。更多还原

【Abstract】 The performances of diesel fuel injection pump decide the power, economy and emission. The fuel injection pump test stand is an indispensable equipment for researching, manufacturing, testing and adjusting fuel injection pump in the maker and repair factory of the automobile and the diesel engines.The 6PSD30-1 fuel injection pump test stand is the 1970’s product and leave unused. Its electrical control part is made up of large discrete components with low-test sensitivity, inconvenient setting and adjustment, high trouble rate. Moreover, Its circuit components are aging and spoiled. This design is rebuilding its electrical control part, designing an automatic control system with automation technology and single chip computer. After rebuilding the test stand, the oil injection times may be presetted, counted and displayed, then stop counting automatically when count completes in measuring oil volume. The drive shaft rotation speed may be presetted, measured, adjusted and displayed. So, the electronic-controlled fuel injection pump test stand will become intelligent stand.The system adopts modular design.8031 single chip computer is the core of this system. It includes two module parts: the oil injection count module and the drive shaft rotation speed module. The two modules also include hardware and soft design.The system composition structure includes 8031 single chip computer, signal test (count sensor and speed sensor), electrical interfaces (amplification shaping circuit, drive, relay, 8155 parallel I/O, 8279 keyboard display, D/A converter) and executive mechanism (electromagnet and electromotor).A control system is connected with peripheral devices including 8155, 8279, DAC0832,sensor detector, power drive interface and executive mechanism on the basis of the 8031 single chip minimal applying system. System hardware design is composed of few electronic devices.The modular design method is adopted in system software design, which programs with MCS-51 assembly language. The whole programs are composed of main program, the oil injection count module program and the drive shaft rotation speed module program.The test stand after being rebuilded can autocontrol the oil injection count and the drive shaft rotation speed, which can be displayed digitally. Compared with primal test stand, it spares units composed of large discrete components, lessens welded points. It greatly improves work reliability, test automation degree, test precision and efficiency. It is convenient for use, maintenance and repair. It has practical meaning with fitting for today’s country conditions and conforming today’s current of improving automatization degree.更多还原