Research And Development Of The Data Acquisition And Analysis System For Internal Combustion Engine

1.The aims and meanings of the task In the course of manufacturing and developing new type I.C. engines, I.C. engine science experiments play an important role. In the process of engines experiments, It is a momentous status that highly accuracy and precision of data acquisition and analysis for I.C. engine's performance parameters.The measured data and analytic results not only carry out I.C. engine work status real time supervision and fault diagnosis, but also evaluate and affirm the excellent or inferior degree of I.C. engine products, and whether or not achieve anticipatory design adjective.The lower level computer system is a portable apparatus. It has tekecommunications with an industrial computer or PC. It can carry through I.C. engine dynamic parameter real time supervision, calculates and analyses I.C. engine's basis performance.More exploration and perfected, more type I.C. engines shall be maintained, serviced, tested and researched. It can become a set of current data acquisition and analysis system too. It has certain applied value and foreground. Its popularity shall bring fairly benefit in the aspect of military affairs, economy and society. 2.Basic design idea As yet, many data acquisition and analysis systems for I.C. engine have been developed in our country and at abroad. With micro-electronics and computer technique rapid development, the apparatus's precision and level are advanced. The equipment's constituted manner is also different. Foreign notability products mostly have Austria AVL company series products, such as AVL640,650,670, Japan ONO SOKKI company series, such as CB366,466,566 and so on. From using functions:1) Foreign apparatus mostly aim at testing and analysis I.C. engine's combustion trait, strongly specialization, and the upgrading are very complex. Their functions are singleness, English interface, lack software and solidified, not changed, not joining oneself software, difference again explored ability, but costliness. 2) On base of imitating foreign apparatus, our country develops some engine data acquisition and Analysis equipment fitting for the situation of our country, but being some problems of extending.From system hardware form, having two kinds:The first kind is based upon SCM.It was shown in Fig 1. Fig 1 I.C. engine data acquisition and analysis system based on SCMAVL company makes use of Motorola 6809 and 68020 to constitute the system, A/D conversion frequency is 500kHz/16ch/12bits. Man-machine conversation adopts terminal and keyboard handle manner. Japan ONO SOKKI CB Series adopts Z80,51,96 SCM,250 kHz/1-4ch/12bits A/D, key-press panel manner. The second kind is based on computer. It was shown in Fig 2. Fig 2 I.C. engine data acquisition and analysis system based on computerSuch as AVL617, ONO SOKKI DS-9100. Many domestic scientific research personnel or graduate students are using the kind manner to develop currency or specialties data acquisition and analysis system. Its manufacture outlay is well situated, has a new strongly explored ability, adapts to the situation of our country.3. The task brief introduction 3.1 The system functions design.We adopt combining first and second kind mode in hardware to constitute the system. Using Intel 80C196KC and MAX197 A/D constitutes lower level computer to accomplish independently those functions of design requiring .It can communicate with industrial control computer (upper level computer) via RS-232 serial interface. Upper level computer can control lower level computer in long-distance, send and receive data. Upper level computer handles, analyzes, judges and registers the data from lower level computer. 3.2 The system hardware basic form.It was shown the hardware form in Fig 3. Upper level computer is on dashed, lower level computer under dashed. ]Fig 3 I.C. engine data acquisition and analysis system hardware des...