The PLC-based tension training system consists of three-phase asynchronous motors, programmable logic controllers (PLC), inverters, touch screen and sensor. Taking PLC as the controller, the system uses two sets of three-phase asynchronous motors to complete the delivery and winding of fibers, uses two inverters respectively to control the operation of the motors, and measures the fiber tension through tension sensor, and then feeds back the result to the PLC. Besides, by the touch screen control interface design, the system can achieve single motors inching, winding, and unwinding, two motors simultaneous operation and other operation modes. PID, fuzzy PID, genetic algorithm based PID and other algorithms can be used in the tests of the system. The PLC-based tension training system is of great help for enhancing the hands-on ability of college students or junior technical staff.

Thispaper designs a set of experiment system for stepper motor, the control system ofstepping motor is composed of stepper controller, drive and stepper motor, withthe single chip processor as the stepper motor controller to realize the morecomplex stepper motor control function. This system has got good teachingeffect in experiment teaching.

This paper introduces a new kind of decoder structure for FPGA implementation of high-speed memory efficient quasi-cyclic LDPC (QC-LDPC) decoder. The code structure, algorithm and hardware structure all adopt optimization design. The decoder adopts modified Turbo decoding algorithm and achieves a decoding throughput of 223 Mbps and frame size of 3,200 bits. The Xilinx Virtex-4 chip used by the decoder only takes up 71 KB memory and makes it exceeds other decoders in aspects of throughput and memory for FPGA implementation.

In order to solve the problem of the hand module’s online temperature measurement in Nitrile glove production line process, we have developed a set of moving objects or device used for online temperature measurement. The device is mounted infrared temperature sensor, by using PLC-controlled synchronous tracking technology it can track the hand module in the production line, so it can ensure the infrared temperature sensor and hand module synchronously measure its temperature correctly. By using configuration software kingview, we have developed mold temperature monitoring online measurement interface, real-time monitoring of the mold temperature opponents. After analysis of experimental results we concluded that the device work stable, acquisition of temperature reliably, so it has a promotional value.

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