Design Of Intelligent Test System Of Fuel Consumption And Rotational Speed Based On Small RTOS51

Fuel consumption and speed of an IC.engine are the indispensable parameters in the production and research field of IC.engine. They are also two significant indexes in estimating the economical efficiency of an engine. So it need a device to measure the engine's speed and fuel consumption quickly and precisely in the research experiments. This article introduces the way of designing a kind of intelligent test system of fuel consumption and rotational speed using embedded system.The paper summarized the development and status of speed and fuel consumption measurement system for diesel engines, introduced the measuring methods and sensors used in the measurement system, and also analyzed their principles, usage and properties. To the hardware, the microcontroller P89V51RD2 used in this system is discussed, and the components including signal collection, result display and serial communication of developing board, which is based on the microcontroller are carefully introduced. To each part, the schematic diagrams and the detailed introductions of the chips used in that part are given.To the software, after getting to grasp the embedded system Small RTOS51's software character, file organization and developing method, we transplant the Small RTOS51 to Philips'P89V51RD2 microcontroller, using the developing tools, Keil C51, finishing the software design which can complete the measurement task. And also use C programming language in C++ Builder developing environment to program software, which used in PC for communication with the testing system.At last, the testing of the system has been presented. And also the paper analyzed the factors which influents the stability of system, discussed the corresponding method to solve the problems.