EPC detector Ultrasonic rectifying Device working principle -ultrasonic sensor correction

- May 03, 2018-


    Ultrasonic Deviation Correction Device The correction control system consists of a controller, a correction ultrasonic sensor, an electric driver, and a deviation guide mechanism. These four components together form a closed-loop control system. The correction sensor detects the edge position of the web, reads the deviation of the actual position from the set position, converts the deviation into a voltage signal proportional to the set position, and sends the signal to the controller. The controller amplifies and calibrates the signal, and outputs the signal to the electric driver. The electric driver drives the correcting and guiding mechanism to perform the corrective action according to the size of the input signal and guides the coil to a preset position.


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    The ultrasonic correcting device is a mechanical device that corrects lateral errors that occur in the forward movement of the web. The shift-based correction is achieved by modifying the span of the web at the inlet and outlet sides. This rectification is accomplished by a fixed base and a rotating device with one or more rotating devices that serve as swinging supports that move around a fixed or virtual rotation point. The maximum angle of rotation is ±7.5°. The ideal position of the rotation point is within 10% of the entrance range or during the correction process. The corrective device can provide the corrective control you need to help your production line operate effectively and efficiently. Combined with appropriate sensors, drivers, and other corrective components, the corrective device can provide a high-precision, balanced, closed-loop, high-dynamic-response servo system.


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Ultrasonic correction device features

     A corrective device system is basically a displacement sensor that detects the position of the strip and compares it with a given amount. If there is an offset, the actuator will correct the offset until it is within the given amount. Since the displacement of the center position is difficult to measure, the edge position of the material is usually taken as the reference of the control signal. The test strips used for the printing are webs with a width of 220 mm, and the tension is small. Wrinkles and curling are not allowed. The strip is wound by the unwinding roller through the middle guide roller to the wind-up roller. The wind-up roller is driven by a DC motor and can be steplessly speed-regulated. The magnetic powder clutch is used for loading, so that the strip has a certain tension, and the magnitude of the tension is steplessly adjusted by the excitation current applied to the magnetic powder clutch. The lateral offset of the tape during transport is detected by the photosensor, producing an electrical signal that is proportional to the offset.


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ultrasonic sensor for EPC detector and ultrasonic correction device



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