The Design And Implementation Of Bladeless Fan Based On FPGA

Bladeless fan is also called Air Multiplier, which let air blow apace out of a1.3mm wide aperture that keeps rotating around the circle. Since the air blows forciblythrough a thin aperture, the quantity of air can be increased to15times bigger and thespeed of the air can reach to55miles. The bladeless fan has no fan so that there willbe no dust, which makes it easier for cleaning. What’s more, people are keen on thebladeless fan because it can protect children from hurting their fingers by troditionalfan. The bladeless fan not only can be used in daily life but also in the field of industry.The working principle of bladeless fan can be applied to the process of drying thealuminium profile on the production line. The aluminium profile comes out from thecooling equipment, fully covered with water. Troditional method of drying is by usingelectric fan. It is well-known that there is a electric engine behind the fan. If the waterdrips on the fan and infiltrate the engine,the engine will be damaged and it willincrease the cost of maintenance. If it causes short circut, there will be other seriousconsequences. By using the working principle of bladeless fan, we can design andmake a circle fan frame in stainless steel. The fan can blow both together andseparately. What is different with the troditional fan is that the engine of the fan isinstalled aside so that the engine will avoid being damaged by the water from thealuminium profile.The article aims at making research on design and making of bladeless fan on thebasis of FPGA technology. The design of the bladeless fan is a complete system whichincludes power source and circuit, human-computer interaction, air pressure sensor,differential amplifier，A/D transition circuit, electric machine drive, FPGA core partscontrol. After the frame design of the whole, we will make experiments on each parts’function and prove and make sure the constitute of each part. Human-computerinteraction part adopts total of three digital LED anode and four independent button.Body infrared pyroeletricity adopts RE200B sensor which is for the exam of humanbody activity. MPXV2007integrated silicon sensor is adopted for air pressure exam.The A/D transition part adopts4access and twelve transition chip AD7991which has12C communication connector. Electric engine drive adopts direct current which iscontrolled by pulse width modulation. The controlling part adpots XC6SLX9-TG144chip from XILINX and assisted by NP5Q128A13ESC0E. Then the manufacture of hardware system will be started. The final debugging finishes after the separate andintegral debugging. After the hardware making, the design of software flow chatproceeds. According to method of integral design and separate programming,bladeless fan based on the FPGA is achieved through continually debugging.