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A microcontroller based on alarm device is developed for detecting a combine working station preventing crop conveying pipeline blocked by excessive feed-in quantity so as to avoid driving belt or driving wheel being damaged. An Atmel 89C2051 single chip microcontroller is employed as the core of the device to make the system simple in structure and small in size. Using Hall effect tachometric transducers...
This paper presents the communication method realized through RS485 bus and RTU protocol of Modbus in strip steel temperature monitoring system of the hot dip galvanizing unit. The emphasis is to analyze the design of S7-200 communication program using the protocol library of Modbus RTU slave station. S7-200 PLC is designed as a slave station which receives message from the industrial personal computer,...
By using background difference method of the video image analysis technology realizes the objects in motion detecting and tracking in high voltage test area. As long as there is a moving object into the test area on the vision camera range tracking, when it invades the cordon area, the system issued the cordon area sound-light alarm signal, if further intrusion high-pressure danger zone,cut off power...
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