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According to slipping between the driving drum and the belt in motion of the belt conveyor, this article uses the intelligent speed sensor to transfer pulse signal into PLC high-speed counter, then realizes the relevant control through program processing and real-timely shows the value of the belt speed by text display. It completes the detection and display of the belt speed by real-timely, realizes the integration among the belt speed monitor and other control parts, reaches the purpose of slipping protection.

This study focuses on the automated packaging systems of the Phthalic anhydride made up of the PLC of Siemens S7-200 series and the weighing instruments, the sensor is mainly used to complete the Phthalic anhydride product weighing, bagging, sealing, and other functions, and The field text display , the configuration software of PC is used to display real-time monitoring interface. The weighing, bagging, sealing and other functions of the Phthalic anhydride product is completed mainly. The coarse and fine spiral motor is used to ensure system accuracy in the entire Control of the packaging process, the Phthalic anhydride product quickly and accurately weighing can be completed in this design. The application of the photoelectric sensor control the sewing machine start and stop of the sealed packaging process fast and accurate; Combination of TD400C and SIMATIC WinCC configuration software provides the packaging system fine human-computer interface.

In the underground data gathering and processing system, TMS320VC55X acquires signal and send it to display correctly on the LCD. The related hardware and software design of system is introduced in this paper. System adopts MzLH01-12864 display module with serial peripheral interface to realize graphic & text display. On the basis of the hardware interface circuit, SPI working mode of DSP multi-channel buffer serial port, software protocol and sequential flow are recommended. System realizes to display signal on LCD correctly, to demonstrate multiple menu of character and graphics and to implement the human-computer interaction.