The Development Of A Small Engine Test System Based On Fieldbus

In many company and laboratories of university, TD115 small engine test-bed test system is very old, and that were manufactured in 1980's. Because this system has many problems in use and low testing reliability, it must be reconstructed. The topic is advanced under this background.This paper, on base of analyzing and comparing the correlational measure and control product of domestic home and overseas, achieves real-timely inspecting and measuring every parameter of ergograph with more advance technology of computer measure and control and a method that software can achieve the function in substitute of complex hardware circuit. This computer measure and control system of electrical power ergograph not only possesses abroad adjustability and flexibility, but also enhances the reliability and real-time charter of system.On the running theory of hydraulic dynamometer and the basic control theory basis,this paper introduces a method to change TD115 small engine test-bed experiment system to computer measured and controlled system, and we developed an integrated monitoring software to make the process of engine test-bed experiment and data processing automadzed by adopting computer-controlled techniques. This paper importantly recommends the way of designing software, which mainly includes data collection, data manager, interface design and output of control variables. And it discusses changing of the experiment equipment, design of hardware, and realization of functional modules of system software. And it also describes the hardware and software with some frames and interfaces.In this paper, the entire software is developed by KINGVIEW6.5 under Windows operating system. It is friendly graphic user interface, flexible operating manner, and powerful data processing function prove that the changed system has much better performance than the old engine-bed test system. This test system can not only largely improve testing precision and reliability, but also accomplish experiments of working condition that cannot be completed under manual control.Via the work of this paper, it is feasible that the measure and control system can testand control every parameters of ergograph by applying computer measure and control technology. The result of system indicates the changed system needs little investment, but takes effect quickly. Therefore it is of great value to many small engine producers and researchers.