| This paper proposes and implements a new open research platform of Wireless sensor networks (WSN) named OpenWSN. The scheme utilizes microcontroller of ARM family, wireless RF transceiver accorded with 802.15.4 specification, three dimension vibration sensor, temperature sensor and etc. Larger sized than Telos, OpenWSN has higher processing capability than current pervasive research hardware like Gains, Mica and Telos. OpenWSN can bear higher performance application, such as image data collection and pan coordinator, thus preferably complement current MCU scheme. OpenWSN follows the principle of standardization, miniature low energy consumption and expansibility. Test of the node shows that the implementation achieves the goal preferably and is an ideal choice of wireless sensor network platform for researchers.At present, the platform of wireless sensor network is used in robot navigation directed by intelligent environment. Every node carries a low resolution camera to perceive environment and its modification. Covering vast area, a great many nodes cooperate in wireless communication mode and provide enough information about environment and also network process. The node introduces FPGA to support fast image process by hardware acceleration mode. Camera, FPGA and OpenWSN is called WiME.In addition, the paper proposes one approach to enhance image resolution by a series low resolution images got by low resolution cameras. The approach is based on homography between two planes calculated by image template and the method maps one image into another image and then does interpolation under scatter data to achieve resolution enhancement. |
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