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Dimensional tolerance and geometric tolerance are the most important technique indicators associated with the function of a machinery product. This article introduced a measurement system, which was developed for a long canister machinery product which needs 100% detection. The inspecting mode, still dependent on a coordinate measuring machine or any other precision measuring instrument, leads to low speed of detection and low accuracy. Aiming at solving the problem, an automatic measurement system is built based on virtual measuring technology, based on LabVIEW virtual instrument platform to develop the main control program to build the peripheral hardware which was founded on some key technique: fixing appliance, sensor applications, exact arithmetic, system integration. Furthermore, it is essential to carry out the research of generalized design. Through using hardware modular unification, interface design standardization, software functionality and configurable hierarchical, achieved the goal of measuring dimensional tolerance and geometric tolerance on the same instrument. Experimental results show that inspection accuracy of the proposed system reaches 99.80%, and the measurement error is less than 0.043mm. The measurement result satisfies the requirement of the long canister technique indicators. The synthetical measurement efficiency reaches three times that of the former method.

DESIGN OF LONG CANISTER MACHINERY PRODUCT MULTIFUNCTIONAL MEASUREMENT SYSTEM BASED ON LABVIEW