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Study on the Supporting Force of Water Spider and its Experimental Model on Water Surface
Wang Qingcheng,Yang Xiaodong,Mao Ning 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.12
Accuracy of designing and producing a micro-force measuring device is 0.1μN, through the device, the maximum supporting force of 5 living water spiders sample were measured, the maximum supporting force of living water striders is 24.8 times its weight. Water spider has large supporting force on water surface, super-hydrophobic structures of water spider legs play important role. designing and producing 5 water strider models, whose legs were made of aluminum wire with 0.45mm diameter, super-hydrophobic processing to surfaces of aluminum wire, its contact angle is 154.5°, experimentally measured that the maximum supporting force of 5 water spider models. Through mechanical analysis, established supporting force mathematical model of the water spider model on water surface, according to the model calculated the maximum supporting force of water spider model. Compare errors between measured values and calculated values of supporting forces, the ratio of the error value is less than 8.39%, verified the correctness the mathematical model of supporting force .
Research and Development of Ethernet Communication System in Numerical Control Workshop
Wang Qingcheng,Cao Guohua,Mao Ning 보안공학연구지원센터 2014 International Journal of Future Generation Communi Vol.7 No.6
There are 10 sets of CNC equipment in a numerical controlled workshop, and set up the CAD/CAPP/CAM center, there is a problem that each production unit is an information island, which can not implement informatization management. This paper takes ZNE-100TL module realized the embedded Ethernet and RS-232C data transfer function as the hardware platform, takes VC++ as software platform, applied Ethernet technology to realize communication the CNC equipment with CAD/CAPP/CAM center. This is good for production management and data transmission in numerical controlled workshop, which can improve the production efficiency.
Research on Measuring Instrument of LoadingCapacity for Insects Sliding on Water Surface
Wang Qingcheng,Yang Xiaodong,Mao Ning 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.11
A device of measuring micro-force was designed, which can measure the maximum loadingcapacityof the insect’s leg which can slide on water surface. The device consists of two parts of micro-force measurement and feed motion control, micro-force measurement accuracy is 0.1μN, micro-analytical balance was chosen to accomplish this function; The smallest linear feed motion speed is 1mm/min, AC servo motor was chosen as the actuator, the servo control system consists of the S3C2410 and drive circuit, etc, fuzzy PID control algorithm has been adopted to achievethis function. Micro analytical balance and servo control system communicate with the computer via RS-232C.
Study on Loading Capacity of Miniature Boats Fabricated from Hydrophobic Plant Leaves
Wang Qingcheng,Yang Xiaodong,Yang Zhuojuan 보안공학연구지원센터 2014 International Journal of Hybrid Information Techno Vol.7 No.6
The contact angle of lotus, canna, green poplar, grape and pumpkin were 150.6º, 135.5 º, 110.4 º, 101.3 º and 94.8 º respectively, five kinds of plant leaves were adhered to rectangular box by double-sided adhesive tape, which were called miniature boats. Miniature boats have super large loading capacity on water surface through the experimental measurements, loading capacity and water dimple depth increases with contact angle. Through mechanical analysis, the paper established mathematical model of loading capacity, comparing the measured values and measured values of loading capacity, the error ratio of loading capacity is about 4.0-6.1%. The loading capacity is made up of buoyancy and surface tension, percentage of buoyancy and surface tension in the loading capacity is affected by the contact angle and geometry size of miniature boats.
Yang Zhuojuan,Yang Xiaodong,Wang Qingcheng,Fan Lidan 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.4
The experimental study on water drop’s impacting characteristics on typical wettability of surface of plant leaves (lotus leaf, piemarker, etc) has been taken in this paper, mainly including: the impacting process of water drops on the surface of lotus leaf and piemarker was shot by high-speed camera; the impacting distance of water drops on the surface of lotus leaf with different heights was measured by self-made slope. The results show that: (1) water drop has good wettability on the surface of piemarker, while it can bounce for several times on the surface of lotus leaf; the morphologic change of water drop during impacting process was observed and the energy dissipation process was analyzed; (2) water drop’s impacting distance on different slopes with different dip angles presents linear relation with the dripping distance. This study has laid certain foundation for realizing water drop’s controlled motion on the surface with super hydrophobicity.