Energy Harvester and Sensor for Power Generation Driven by Vibration Amplitude Threshold
An energy harvester and vibration amplitude technology, applied in the direction of generators/motors, electrical components, piezoelectric effects/electrostrictive or magnetostrictive motors, etc., can solve the problem that sensors cannot effectively use energy and cannot fully realize self-supply and other issues, to achieve high reliability and durability, and to facilitate system integration
Active Publication Date: 2017-06-16
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology
[0006] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an energy harvester and sensor for generating electricity driven by a vibration amplitude threshold, which is used to solve the problem that the sensors in the prior art cannot effectively use energy and require additional detection equipment To detect the sensing signal and require additional energy to transmit the signal, the problem of not being able to fully realize self-supply
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[0053] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0054] see Figure 1 to Figure 16 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed ar...
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The present invention provides an energy harvester and a sensor for power generation driven by a vibration amplitude threshold, at least including: a first-stage vibrator for sensing external vibration; the first-stage vibrator includes a first spring, a first mass block and The first magnet; the second-level vibrator for generating electric energy; the second-level vibrator includes a second spring, a second mass block, and a second magnet connected in sequence; the first-level vibrator and the second-level vibrator are all arranged on a base; when the external vibration amplitude is less than a preset threshold, the energy harvester does not generate electricity; when the external vibration amplitude is greater than the preset threshold, the first-stage vibrator drives the second-stage vibrator to vibrate , to generate electricity. The present invention has the function of threshold-driven power generation, and the sensor using the energy harvester can use the power generation behavior as a sensing signal and emit it in the form of pulses to realize the "event-driven" sensing function of self-supply.
Description
technical field [0001] The invention belongs to the field of micromechanical sensors, and relates to an energy harvester and a sensor for driving power generation by a vibration amplitude threshold. Background technique [0002] The "event-driven" mechanism is an important technology in the deployment of wireless sensor networks. The so-called event-driven means that only when certain specific events (such as earthquakes, fires, temperature / humidity, etc. reach a certain threshold) occur, the sensor is awakened for data transmission, and it remains in a low-power sleep state at other times[ S. Tilak, N.B. Abu-Ghazaleh and W. Heinzelman. "A taxonomy of wireless micro-sensor network models." ACM SIGMOBILE Mobile Computing and Communications Review6, no.2(2002):28-36.]. This mechanism is of great significance for the effective use of energy, prolonging the life of the sensor network, and reducing the cost of use. Event-driven in the usual sense is carried out at the medium ac...
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IPC IPC(8): H02N2/18
Inventor 李昕欣唐翘楚
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI