Fig. 1 illustrates the schematics of the proposed impact-driven, frequency up-converted broadband quin-stable energy harvester (IQEH) and its vibration behavior. The magnets with copper layers (protect the magnets in impact) at the tip of the cantilever can be considered as proof mass to change the resonant frequency, while their
Read MoreIn the application of flow-induced vibration, a suitable scheme is to suspend a horizontal-axis pendulum in water flow or wind and integrate a piezoelectric transducer on the pendulum rod. The inclined-axis pendulum can also be employed to tune the natural frequency of the energy harvester when the vibration frequency is very low.
Read MoreThe TEH of a conventional piezoelectric beam with multiple magnets exhibits hopping phenomena and a wide operating bandwidth under harmonic excitation [
Read MoreVibration energy harvesting using piezoelectric transduction is becoming a promising alternative to electrochemical batteries for powering the low-powered wireless and portable electronic devices. Unlike typical cantilevered piezoelectric vibration energy harvesters (PVEHs), where the piezoelectric beam with a tip mass experienced the vibration
Read MoreA tuned liquid damper (TLD) is a low-cost and simple-toinstall system, which is widely used to control passive structural vibrations (Konar and Ghosh 2021). TLD mainly consists of a tank
Read More2.1. Generic VEH Model. In general, a vibration-based energy harvesting device can be modeled as a spring–mass–damper system [] based on the linear system theory as shown in Figure 2a, which consists of a spring of stiffness k struc, a mass of m struc, and dampers denoted as mechanical dashpot b m and electrical dashpot b e, respectively.Here the
Read More3. Electromagnetic converters. In this section different vibration electromagnetic energy harvester designs are described and evaluated. The conversion of mechanical to electrical energy for electromagnetic converters is based on the Farday''s law which is defined by: (1) V = N d ϕ dt where V, N and ϕ are the electromotive force, the
Read MoreThis paper presents a tunable nonlinear energy harvesting device for energy harvesting in ultra-low frequency vibration environments. A quasi-zero stiffness system based on a
Read Morethe working principle of which is the same as the en ergy storage brake on the hybrid electric vehicle [63–66]. It is not only capable of outputting more power than the insole generator but is
Read MoreWind energy is converted to electrical energy by the wide use of conventional electromagnetic generators (EMG) on the basis of electromagnetic induction principle and turbine structure. Although it is an efficient and reliable power generation technology, EMG is often criticized by its disadvantages of bulky volume, massive
Read MoreAs a regenerative energy production method, vibration energy harvesting can be categorized as a micro energy generation technique, which converts vibrations
Read MoreEnergy harvesting is the method of extraction of electrical energy from ambient sources. The sources such as heat, light and vibration possess a great amount of energy to extract. The increasing use of wearable devices requires a micro generator which should be able to generate low power usually in the range of micro and milli watts.
Read MoreAn indirect-type low-frequency piezoelectric vibration energy harvester is proposed. • High-intensity vibration is harvested using secondary excitation of pressured fluid. • The harvester is a combination of vibration-based and flow-induced energy harvesters. • A dynamic model related to piezo-diaphragm vibration and fluid motion is
Read MoreFor traditional vibration suppression–energy harvesting devices, higher damping in a certain range results in a better vibration isolation effect but lower energy conversion efficiency [22]. In contrast, using the proposed ASTC algorithm, the output power of the VS-EHCS is greatly improved and vibration is suppressed.
Read MoreThe conventional and commonly adopted approach for vibration energy exploitation is the oscillator-based vibration energy harvesters (O-VEHs) [13], which were initially designed with linear oscillators, resulting in relatively high working frequency and finite bandwidth [14] oadening the working bandwidth and lowering the working
Read MoreThe controllable management of undesired energy flow and storage is a crucial schedule for most mechanical applications. The traditional dynamic vibration absorption method mainly uses the frequency tuning principle to weaken the resonance peak of the main system, and the vibration energy is only temporarily transferred to the
Read MoreInspired by shallow-water sloshing in a moving tank, a novel type of vibration-based piezoelectric energy harvesting device composed of a piezoelectric
Read MoreThe working principle of the TENG is based on triboelectrification and the relative-rotation-induced cyclic in-plane charge separation between copper and Polytetrafluoroethylene (PTFE) [34] addition, the permanent magnet embedded uniformly on the circumference
Read MoreAn electromagnetic vibration energy harvester is a device that utilizes electromagnetic induction to convert mechanical energy into electrical energy. When a magnet and a coil undergo relative motion, the changing magnetic flux in the coil generates an induced electromotive force.
Read MoreThe vibration frequency is computed using a sensor interfaced to an on-board microprocessor. This information is used to compute the required electric field to damp out the force causing the jitter. Two cases are considered: (i) a metallic cylinder (or plane) vibrates freely, remaining parallel to the ground plane and (ii) a cylinder (or plane
Read MoreVibration energy harvesters scavenge energy from mechanical vibrations to energise low power electronic devices. In this work, we report on vibration energy harvesting scheme based on the
Read MoreWorking principle of energy harvesting from pitch vibration using rope transmission. the electronic device can work in real-time mode for seven days by using a fully charged battery with capacity of 800 mAh and voltage of 3.7 V. Thus, it can be calculated that the electrical power consumed by the electronic device is approximately
Read MoreThe current research on vortex-induced vibration energy harvesting can be divided into the following streams: (1) vortex-induced vibration piezoelectric energy harvesting with a nonlinear magnetic force [31], [32]. The structure of a piezoelectric energy capture device can be improved by introducing a magnetic field, and the natural
Read MoreVibration-such as from human motions, machinery vibrations, vehicle vibrations, and building vibrations-is an attractive energy source for powering those electronic devices
Read MoreThe vibration on the platform is probably induced by the two natural gas compressors on the lower deck. The natural gas compressors are located in the central of the lower deck (Fig. 1 (b)). Each compressor is about 100t, and the
Read MoreA cantilever piezoelectric energy harvesting configuration is proposed in Fig. 1 (a), which consists of a transduction unit (TU), a rod, a frame, and a base. The TU and the rod are the main body of the device, and the frame and the base auxiliary devices to fix the main body to reduce the vibration of the rod during the sliding of the sleeve.
Read MoreHowever, the inconsistency with the frequency of the energy source and low output power density remain problems for high energy output. In this work, we propose a shear mode piezoelectric energy generator, which utilizes the friction-induced vibration (FIV) and high shear mode piezoelectric coefficient to improve the energy output.
Read MorePiezoelectric energy harvesting devices based on ambient vibration will exhibit good output power, while they are excited at frequencies close to the resonant frequency. However, the ambient vibrations distribute in a wide frequency range in majority of applications.
Read MoreOne of the key problems of electret-based vibration energy harvester (eVEH) modelling is that the surface voltage itself cannot precisely reveal the charge storage characteristics of the electret fabricated by different processes. In this paper, we endeavor to interpret the charge migration mechanism of the eVEH with electrets
Read MoreThe source of vibration can be converted into electrical energy by piezoelectric, electrostatic, and electromagnetic methods. This research work
Read MoreThis study investigates the feasibility of utilizing a flow-induced vibration actuator as a potential energy source using piezoelectric energy harvesting. The focus is on exploring the behavior of piezo films configured as cantilever beams subjected to flow-induced vibration, which can be induced with fluid or wind streams. The primary
Read MoreAccording to the difficult replacement and poor endurance of the battery for wireless sensor network nodes, a micro piezoelectric vibration energy storage device was developed in this paper. The electric generating performance of the device was then tested on a self-made experimental system. It is shown that the developed energy
Read MoreTo test the performance of the inertial vibration energy harvesting device, a shaker bench test [60] can be performed, as shown in Fig. 11 (b). The shaker produces an excitation frequency that can be progressively increased over a period of time to assess the rapidity and stability of the energy harvesting device response.
Read MoreHerein, we propose a MEMS multimodal vibration energy harvester with specifically cascaded flexible PDMS and "zigzag" silicon beams to simultaneously lower the resonant frequency to the
Read MoreA considerable amount of ambient vibration energy spreads over an ultra-low frequency spectrum. However, conventional resonant-type linear energy harvesters usually operate within high and narrow frequency bands, which cannot match the frequencies of many vibration sources. If the excitation frequency deviates a bit from
Read MoreAs shown in Fig. 7, the vibration is composed of some low frequency signals and a main frequency signal of 16.5 Hz. According to the theory of induced vibration, structure''s responses are mostly caused by the vibration source with main frequency, and the rest parts of the response signals are the vibrations with natural
Read MoreThe most crucial component of our OEH is a specially designed mechanism that can scavenge disordered and random vibration energy. The mechanism and related working principles are shown in Fig. 4. The OEH comprises a spiral spring, a one-way bearing, and a motor, all of which are connected by a long shaft. Download :
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