【作者】 朱明刚；

【导师】 张文平；

【作者基本信息】 哈尔滨工程大学 ， 动力机械及工程， 2004， 硕士

【摘要】 柴油机的燃油消耗率是柴油机的重要技术参数，是评价柴油机性能及其经济性的主要指标之一。开发和研制适合于船用的大功率柴油机燃油消耗仪，具有理论和实际意义。 本文阐述了船用大功率柴油机燃油消耗仪的系统组成、硬件电路和软件设计流程。根据实际工程的需要，在柴油机燃油管路中可采用不同种类的流量计测量柴油机燃油消耗量。流量计测得的柴油机燃油消耗量通过变送器计输出频率信号，送入Intel 80C196KC单片机。80C196KC单片机测量变送器输出的频率信号，计算并显示测量次数、测量时间、燃油消耗量、平均油耗率，并在系统微型打印机上打印输出，实现柴油机油耗的自动测量。 在系统测量控制软件开发过程中，对所使用的流量计进行选型，分析了柴油机燃油测量系统管路配置方案及影响因素；研究了多种频率测量方法来测量变送器输出的频率信号，采用了一种新的频率测量方法，提高了燃油消耗率的测量精度；采用汇编语言，PL／M语言，C语言进行了多种方案的程序编制，编制了MSC-96系列单片机常用浮点库，解决了汇编语言编程中浮点数的处理问题；编制了80C196KC单片机与PC机串行通讯程序及燃油消耗仪计量检测程序。更多还原

【Abstract】 Fuel consumption rate is an important technical parameter of diesel engine, and one of major indexes for the evaluation of engine performance and economics. Development and design of a fuel consumption meter suitable for high power marine engine is desirable and important for the practical applications.System component, hardware circuit and software design route is introduced and discussed in the present paper. According to the needs of practical engineering, different type of flow meters may be used to measure the fuel consumption rate in fuel pipeline of diesel engine. The fuel consumption rate of diesel engine measured by flow meter is outputted through a transmitter in terms of frequency signal; and sends to Intel 80C196 MCU. Intel 80C196 measures the frequency signal from the transmitter, calculates and displays the measuring time, the amount of fuel consumption, the average fuel consumption rate, and prints the results on the embedded micro-printer to achieve the automatic measurement of engine fuel consumption rate.In the developing procedure, the type of flow meter has been selected, and the arrangement of fuel pipeline and influence factors is analyzed for the fuel consumption rate of diesel engine. A number of measuring methods have been studied to measure the frequency signal from the transmitter, and a new measuring method has been used to improve the measuring accuracy of fuel consumption rate. A few of programming design methods have been made using assembly language, PL/M and C language. The floating point number subroutine is formed, and the treatment of floating point number in assembly language is solved. A serial communication program of 80C196 MCU to PC is developed and a measuring examination program for the fuel consumption meter is developed.更多还原