In order to test the seed tape tensions of the rice seed tape twisting machine during the process, a dynamic testing system for the seed tape tensions was designed composed by the tensions sensor, data acquisition controller and PC, etc. The dynamic performance test of the machine was done and the seed tape tensions in the different speed was test by using the virtual instrument technology. The time domain analysis of the seed tape tensions was done by applied analysis software. The results show that, the seed tape tensions in the moving could be test by using tensions sensor and the virtual instrument technology. It has the important meaning for the seed tape tensions of dynamic measurement. It provided the basis for the dynamic performance testing and parameters optimization of the rice seed tape twisting machine.
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