The Research On Infrared Controller Powered By Piezoelectric Generator

It's well known to all that batteries contain Hg, Pb, Cd and other harmful substances which may cause great harmful to our environment. Moreover, because of its big volume and its short life, this batteries cannot satisfy the requirements of micro-electron-products gradually. It's a new tendency to replace the traditional battery with the miniature electric power facility, and the study of miniature electric power facility becomes a hot spot in the world. The piezoelectric power facility has the advantages of simple structure, no heat, no pollution, no electromagnetism interference, easy to machining, structure's miniaturization and integration, and so on. It supplies a new reference for power supply about a variety of mini-size electrical products, passive sensor system and monitoring system.It has been several dozens years since the phenomenon that piezoelectricity ceramics may have electric charge under the external force is discovered . However, because the electro-mechanical transformation efficiency is low, the power of former piezoelectric material can't drive the electronic device. With the in-depth study of piezoelectric materials, piezoelectric materials generating capacity has been greatly improved, on the other hand, the continued with the introduction of ultra-low power consumption of electronic components, integrated chips, have mastered a methods of low-power consumptions'circuit design. It make it's possible that the piezoelectric power facility become the energy source of the low power loss electronic installations. This article then unifies the piezoelectricity electricity generation technology and the low power loss monolithic integrated circuit electric circuit, designs a simple remote control system .In the topic research earlier period, we use the piezoelectric vibrator for the external guidance system power supply which buys back, the result is must move piezoelectric vibrator two or three times to be able to send out a signal. Piezoelectricity electric power facility Power capacity is low and the launch module power loss compares Taisho is a big question. To ensure the program viable, we have three major aspects: First, to enhance the piezoelectric electricity generation ability, second, it enhances the efficiency of energy use, and the third is to reduce the electric circuits'power loss.First of all, we need to enhances the ability of power generation. As the remote control generator set, the most ideal situation is, when single drive the piezoelectric vibrator can produces sufficient electricity satisfy the energy request which the signal launch needs. Therefore, this article first utilizes the piezoelectricity, mechanical vibrations mechanics and the materials mechanics theory knowledge, analyzes when the single drive the piezoelectric vibrato to the cantilever beam installs when the way the vibration situation by and its the output voltage characteristic curve, the analysis influence piezoelectric vibrator vibrates the frequency, the oscillation amplitude and amplitude taper speed each kind of factor, produces the correlation the theoretical formula. Among them, the piezoelectric vibrator length and width influence the vibrates'frequency biggest; When primary drive the rate of head movement size is affects the oscillation amplitude the only factor; The piezoelectricity piece length, the width and the damping quite are big influence the amplitude taper speed. On the basis of the above analysis, increase the generating capacity of piezoelectric vibrator, if the impact instead of using manual compression, the initial deformation of the piezoelectric vibrator increase or increase Arc support, and other negative installation Vibrator and so on. Finally, confirms previous experiments'conclusion through several typical experiments. The experimental result show: The piezoelectric vibrator length can be active control its power supply on time; The reverse side installment can obviously enhance the piezoelectric vibrator power capacity; The use impact and adds the circular arc support also to have the quite tangible effect to the power capacity enhancement; But the piezoelectric vibrator length to the voltage weaken speed influence is not very obvious. Theoretical analysis and experimental light of this chapter, we can design a high power generating capacity of piezoelectricity electric power facility.Second, it enhances the efficiency of energy use. The piezoelectric vibrator produces the alternating voltage which is one weakens unceasingly, in fact is worth the use on only then the voltage high part. This alternating voltage needs to pass through the rectification filter constant voltage can transport to the monolithic integrated circuit electric circuit.. After the power circuit transformation, the energy certainly has the loss; moreover the output voltage also starts by the constant voltage value to weaken. In order to enhance the energy conversion efficiency, We will use the low power Schottky diode finishing (BAT54S) and the low power of three-terminal voltage regulator (7130) ; To allow more time to maintain the output voltage at 3.0V, we choose an appropriate filter capacitor. When C = 4.7uF, C = 0.1uF, the output voltage power supply by power circuit can maintain the longest at 3.0V, voltage weaken speed quickest, such voltage curve is ideal.Third is to reduce the electric circuits'power loss. Before the design of the remote control system, this paper presents a low-power electronic circuit design principle, instructs the overall system plan the determination, the part choice and the procedure compilation. In order to effective reduces the power loss, we have selected the field the MSP430 monolithic integrated circuit(单片机) which is famous by the low power loss, replaces traditional the simulation electronic circuit. This series monolithic integrated circuit power loss very low, the function is formidable, conforms to this system requirement very much. This article chooses the infrared remote control, because of its structure simple, manufacture convenient, power loss low, the cost inexpensive. The power loss is a quite important target of the launches module and the receive module, the launch modules'big power loss has let this external guidance system .not feasibility. Because the receive module needs to continuously supply power, waiting for the signal arrival, therefore the power loss was big and also wasted the electrical energy. In this article, only focus on research launch module, receives module is only the simple introduction.After designs the concrete electric circuit and the procedure, and then start the concrete electric circuit manufacture and the test. Because of the time that the remote control system is not designed the structure; the piezoelectricity excitation meter which when is selects makes experiment uses. Piezoelectric vibrator by cantilever beam form install reverse side, use impact drive way, below pad cambered surface support. Test time, lets the receive module the relay out-port with a resistance and LED series, the use of diode-defense judged the system feasible. Test results show that in the distance of 6 meters, the reception still very good. Over 10 meters receiver had no response. This shows system feasible, but has yet to improve the remote control distance. The preliminary analysis possibly is the MSP430 I/O mouth driving force is limited. In addition, We use the piezoelectricity excitation meter for the remote control module power supply which buys, after the comparison knew that piezoelectricity excitation meter indeed can enhance the piezoelectric vibrator power capacity, also reflect the MSP430 monolithic integrated circuit electric circuit power loss lower than the launch module power loss. Finally, we carry on the sketchy estimate to the transmission circuit power loss; its value probably is 8.2mW.The functions of the remote control system is simple, press the button, while presses down the pressed key, also gives a piezoelectric vibrator impact, the launch module transmits a signal immediately, that control receive module relay passes breaks, thus reutilizing the remote control function. Of course, we can be prepared through electronic circuit or another procedure for the control system to achieve greater functionality. This article may as the piezoelectricity electric power facility apply to the low power loss electronics installation reference.