Application of LabVIEW to Automated Measuring Dynamic Balancing of Motorcycle Crankshaft

A new method to measure dynamic balancing of motorcycle crankshaft based on LabVIEW is introduced. Crankshaft is a special rigid rotor. It is composed of crankshaft, connecting rod and slider. When the crankshaft rotates, its centrifugal forces are generated which result in the supporting structure (also called vibration table) vibrating. The vibration signal is detected by vibration sensors fixed to the vibration table, and sent to the computer. Data acquisition, signal processing and analyzing can be completed by virtual instrument based on LabVIEW. Then unbalance value including amplitude and phrases can be obtained. Computer-based measurement is used with software to set up automated test system that can make fast measurements without human intervention. The application of virtual instruments makes data analyzing more accurate, and decreases the measuring time significantly. The results show that this new measuring system has the advantages of easy-of-use, high precision, high efficiency and low costs.