| Brake shoes stack adjuster is an important part of act-enable of trains and it is used to adjust the distance between Zhawa and Wheels in pair. With the development of the railroad, the capability and the stability of the act-enable parts of these equipments are faces baptism. At the same time, testing the biometry of the equipment faces higher needs than before too. For no indexes of tire-age before, with the revving up of the train, this problem becomes serious little by little. In order to test the tire-age, a machine of examination of it is used, and only one test always last three months long, so it is necessary to develop a set to stakeout the machine instead of humans.Contraposing the facts of the testing fieldwork of the machine, the design uses the pc-camera as the tool to get the abundance information, uses the technique of Serial communication, technique of Video for Windows and theories of digital image processing, uses Visual C++ as the developing environment and exploits this new set for testing and controlling automatically. The design involves four models and makes the automation of test-control reality. It also uses some theories of digital image processing to. deal with the information of the test in that time. The design could offer helps to the unmanned automation of the test-control. It will reduce the intension of workers, improve the efficiency, and cut down the artificial infection, as for these, it can improve the veracity and the security and has great significance.From several sides as choosing transducer, pivotal technique of software, theory of digital image processing and so on, this paper narrates design of the set, basic theory and concretely realization all-around. The design explores audaciously and tries times without number as to find the method of how to judge the state of brake shoes stack adjuster and how to make it reality veraciously and fleetly. This set craves out spaces for further research and has a wide forground.
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