Constant tension control device and control method

Abstract

The invention discloses a constant tension control device and a control method. The constant tension control device comprises a first guide wheel, a floating pulley assembly, a second guide wheel, a measuring and monitoring mechanism, a guide wheel mounting plate, a third guide wheel, a bottom plate, a driving mechanism and an encoder; one end of a base material is attached to a winding roller ina winding manner, and the other end of the base material sequentially penetrates through the third guide wheel, the measuring and monitoring mechanism, the second guide wheel, the floating pulley assembly and the first guide wheel from the winding roller; and the driving mechanism is used for driving the winding roller to rotate according to a tension value, displayed by the measuring and monitoring mechanism, of the base material, so that winding or unwinding of the base material is achieved, and the tension of the base material is kept constant. According to the constant tension control device, a motor-driven magnetic powder clutch is used as an actuating mechanism, and the floating pulley assembly is used for passive adjustment, so that the tension of a controlled target is well controlled; and the tension of the controlled target is accurately controlled by adopting a method of combining feedforward control and feedback control, so that the control precision is improved.

Description

technical field [0001] The invention belongs to the technical field of industrial control, and more specifically relates to a constant tension control device and a control method. Background technique [0002] Tension control refers to the technology of automatically controlling the tension of the processed material that is static or continuously moving between two processing equipment. Traditional tension control is generally used in papermaking, printing, packaging, textile printing and dyeing and other industries. [0003] The current tension control method on the market is aimed at the constant tension control of a double-ended fixed system with one side unwinding and one side winding. This scheme is relatively mature and can meet the basic needs of the industry. In these tension control systems, the controlled target is always in motion. Moreover, in these tension control systems, the positions of the guide wheels at both ends of the material to be processed remain un...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a constant tension control device and control method, thereby solving the technical problem that the tension of the base material connecting two relative mobile platforms is not constant

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