A low-frequency vehicle-mounted indirect excitation energy harvester
An energy harvester, an indirect technology, is applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc. Amplitude vehicle environment and other issues, to achieve high reliability, low system stiffness, and avoid damage
Active Publication Date: 2018-12-25
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology
For this reason, various forms of piezoelectric and electromagnetic vibration power generation devices have been proposed. However, due to structural principles or device characteristics, the natural frequencies of existing vibration power generation devices are relatively high, which cannot meet the requirements of low frequency and large vibration power generation devices. Amplitude Vehicle Environment
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[0009] The end cover b with the limit magnet c and the limit reed r is installed on the shell a through screws, and the upper and lower ends of the square guide post e with the slider d are respectively embedded in the end cover b and the shell a On the bottom wall; the slider d is provided with a boss-d1, and the boss-d1 is equipped with a piezoelectric vibrator h and a spring piece i through screws and a pressure plate n, and the upper and lower sides of the slider d are respectively installed with moving magnets through screws 1 f and moving magnet 2 f'; on the bottom wall of housing a, limit reed r and limit magnet 2 c' are installed on the bottom wall of housing a, and limit magnet 2 c' and limit magnet 1 c are set on the square guide post e Above: The opposite magnetic poles of the moving magnet 1 f and the moving magnet 2 f' are oppositely installed, the same-sex magnetic poles of the moving magnet 1 f and the limit magnet 1 c are oppositely installed, and the same-sex m...
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The invention relates to a low-frequency vehicle-mounted indirectly excited energy harvester and belongs to the field of automotive electronics and self-powering. An end cover provided with limiting magnets and limiting spring sheets is arranged on a shell; the upper end and the lower end of a square guide post sleeved with a sliding block are inlaid into the end cover and a bottom wall of the shell separately; the sliding block is provided with bosses; each boss is provided with piezoelectric vibrators and a spring sheet; movable magnets are arranged at the upper side and the lower side of the sliding block separately; the bottom wall of the shell is provided with the limiting spring sheets and the limiting magnets; like poles of the movable magnets and the corresponding limiting magnetsare oppositely arranged; bosses are arranged on a left side wall and a right side wall of the shell; the other ends of the spring sheets are arranged on the corresponding bosses; the piezoelectric vibrators at two sides of each spring sheet are equal in quantity; a suspended magnet is arranged at a free end of each piezoelectric vibrator; a suspending magnet is arranged on each spring sheet; the like poles of the suspending magnets and the corresponding suspended magnets are oppositely arranged; the maximum compressive stress on piezoelectric patches in a non-working state is one half of permissible compressive stress; and when the piezoelectric vibrators are in contact with the corresponding limiting spring sheets, the maximum compressive stress on the piezoelectric patches is the permissible compressive stress.
Description
technical field [0001] The invention belongs to the field of automotive electronic technology and self-power supply technology, and in particular relates to a low-frequency vehicle-mounted indirect excitation type energy harvester. Background technique [0002] Car positioning and navigation systems have been widely used in real life, but their functions are single, mainly to guide drivers to their destinations. From the perspective of practical application, the vehicle positioning and tracking system can also realize functions such as real-time monitoring and reporting of vehicle speed, automatic alarm of major traffic accidents, or tracking of vehicle theft. Since the existing positioning system is powered by the engine, the positioning system will not be able to continue to work when the engine is powered off or fails; in addition, the existing positioning systems are all external, can be artificially closed or destroyed, and cannot be used for speed monitoring and theft...
Claims
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IPC IPC(8): H02N2/18
Inventor 陈松黄乐帅曾平
Owner ZHEJIANG NORMAL UNIVERSITY