This paper introduced a system based on wireless network technology, which achieved node-to-node data collection and transmission. The ZigBee-based wireless network of the system adopted the chip CC2530 of TI company. The system developed applications based on Z-STACK for data collection and wireless transmission, it used VC++ to make a PC software for real-time monitoring of temperature and humidity. The research results show the feasibility of the system, and it would be widely used in the measure field of agriculture.

To promote the detection efficiency of combine harvester chassis frame welding deformation, a weld deformation detection system was coming up in this paper to automatically detect the weld deformation of combine harvester chassis frame. The system assessed weld deformation according to flatness and parallelism of the specific plane of combine harvester chassis frame. Two high-precision laser sensors were mounted on broadside of a gantry to measure the parallelism of the chassis frame, and another two laser sensors were mounted on top of the gantry to measure the flatness of the chassis frame. The analogue signal from the laser sensors was collected by a data acquisition instrument. Two step motors were mounted on a liner guide placed at bottom of the gantry to drive the chassis frame to specific measurement positions. A software developed by LabWindows/CVI@ accomplished human interaction besides of controlling the step motors, reading the laser sensors via data acquisition instrument, and displaying the flatness and parallelism. A serial of testing showed the system could measure the flatness and parallelism of the chassis frame automatically, and meet the needs of combine harvester chassis frame weld deformation prediction.

According to the ideal wheel speed change curve during the ABS braking and the vehicle inertia electromechanical mixed analog principle, the bench testing system for vehicle ABS performance was designed. In order to improve the reliability of the wheel velocity detection and optimize the systematic structure, the method of using the free roller to detect wheel speed and the regenerative braking energy compensation of asynchronous motor were proposed. The results show that designed test bench system can achieve ABS performance testing.

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