Studies Of The Microcomputer Controlled Test Bench 701

The microcomputer controlled test stand 701 is equipped with a microcomputer controlled system on the original 701 test stand. It can complete and simulate artificial operation of all the test items according to the ministerial standard. The procession of all the tests needn't manual interposition. It realizes automation completely in vehicle braker test and test data recording and judging. The test equipment has a novel structure, and it is visualizing and imaging. The test's results are accurate and reliable.The paper mainly describes the way and principle about the microcomputer controlled system for 701 test stand. The controlled system consists of four sections. The first section is about the way and principle of the H(K) F operation valve; The second section is about controlled way of the air gate. The third section is about the controlled and transmission of the pressure signals in train pip, auxiliary pressure air tank and bake tank; The fourth section is about the auto test way and principle of the three thoroughfare valve leakage. Besides, the paper introduces about the I/O, A/D transforming interface circuit in the controlled system. At last, the paper analyses briefly about the functions and characteristics of the system program, and shows the technology process frame picture of the main program. So that the whole controlled technological process can realize.