Hybrid Solar-RF Energy Harvesting Systems for Electric Operated Wheelchairs

Nguyen, Cuong V.; Nguyen, Minh Tuan; Quyen, Toan V.; Le, Anh M.; Masaracchia, Antonino; Nguyên, Hà Trần; Nguyen, Huy P.; Nguyen, Long D.; Nguyen, Ha Q.; Nguyen, Vinh

doi:10.3390/electronics9050752

Cited by 7 publications

(8 citation statements)

References 27 publications

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“…These devices are usually powered with lightweight batteries having low capacity that require frequent battery re-charging or replacement, which is undesirable and sometimes difficult in the case of implantable devices. To achieve energy autonomy, widely investigated energy harvesting sources include RF [1][2][3][4], light [5], heat [6], and vibrations [7][8][9]. Among these sources, vibration energy has been extensively investigated due to the abundance of vibrations in the ambient environment.…”

Section: Introductionmentioning

confidence: 99%

Dual Piezoelectric Energy Investing and Harvesting Interface for High-Voltage Input

Khan

Saif

Lee

et al. 2021

Sensors

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A novel harvesting interface for multiple piezoelectric transducers (PZTs) is proposed for high-voltage energy harvesting. Pre-biasing a PZT prior to its mechanical deformation increases its damping force, resulting in higher energy extraction. Unlike the conventional harvesters where a PZT-generated output is assumed to be continuous sinusoidal and output polarity is assumed to be alternating every cycle, PZT-generated output from human motion is expected to be random. Therefore, in the proposed approach, energy is invested to the PZT only when PZT deformation is detected. Upon the motion detection, energy stored at a storage capacitor (CSTOR) from earlier energy harvesting cycle is invested to pre-bias PZT, enhancing energy extraction. The harvested energy is transferred to back CSTOR for energy investment on the next cycle and then excess energy is transferred to the battery. In addition, partial electric charge extraction (PECE) is adapted to extract a partial amount of charges from the PZT every time its voltage approaches the process limit of 40 V. Simulations with 0.35 µm BCD process show 7.61× (with PECE only) and 8.38× (with PECE and energy investment) improvement compared to the conventional rectifier-based harvesting scheme Proposed harvesting interface successfully harvests energy from excitations with open-circuit voltages up to 100 V.

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Section: Introductionmentioning

confidence: 99%

Dual Piezoelectric Energy Investing and Harvesting Interface for High-Voltage Input

Khan

Saif

Lee

et al. 2021

Sensors

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“…Based on that, many applications have applied different EH technologies to improve their performance and service quality. Currently, the harvested energy can support many electricity-operated systems, such as wireless sensor networks [6,7], low-power consumption devices, robots, unmanned aerial vehicles [8][9][10], and even wheelchairs [11] to prolong the operating time. EH technologies can be combined to collect energy not only from a single source but also from some suitable ambient sources, called hybrid, to provide sufficient power for specific applications [12,13].…”

Section: Introductionmentioning

confidence: 99%

The Hybrid Solar-RF Energy for Base Transceiver Stations

Nguyen

Quyen

et al. 2020

Wireless Communications and Mobile Computing

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The base transceiver stations (BTS) are telecom infrastructures that facilitate wireless communication between the subscriber device and the telecom operator networks. They are deployed in suitable places having a lot of freely propagating ambient radio frequency (RF) and solar energies. This paper is aimed at converting received ambient environmental energy into usable electricity to power the stations. We proposed a hybrid energy harvesting system that can collect energy from RF and solar energies at the same time. The sources are combined to provide to a significant amount, to contribute to operational expenditures that reduce energy costs, and to improve the energy efficiency of the base station sites in rural areas from the most common renewable resources since the base stations are major consumers of cellular networks. The hybrid systems are designed with circuits, simulated, and compared to show their good performance to the base stations. PSIM, PROTEUS, and MATLAB software are used to simulate for evaluating the voltage and the current output of the hybrid systems that meet the power requirements. The design and simulation results show the feasibility of our proposed method with the battery storage that can be deployed not only in real base stations but also for other electrical operated systems.

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“…Al momento de finalizar la marcha, la desaceleración del andador provoca un efecto Tensión (V) Tiempo (s) similar al descrito anteriormente, no obstante, al no haber ninguna fuerza adicional a la de la gravedad, la generación de tensión perdura hasta que el movimiento ondulatorio del brazo del péndulo cese. La tensión pico a pico (máxima) generada durante esta prueba fue de unos 2.2 V. Desde el punto de vista de recolección de energía, este nivel de tensión permitiría almacenar una cantidad de energía importante sin necesidad de usar convertidores DC-DC tipo Boost, como el que usan en [8]. La ventaja de esta propuesta es que la tensión generada no depende de la velocidad del andador, sino de la fuerza de empuje al iniciar la marcha y la desaceleración al momento de finalizar la marcha.…”

Section: Resultados Y Discusiónunclassified

“…En lo que respecta al cuerpo humano, debido a su naturaleza dinámica, la energía biomecánica ha demostrado ser una excelente alternativa para para prescindir del uso de baterías en sistemas vestibles y/o portables [4,5]. La energía biomecánica puede recolectarse directamente adaptando un sistema de recolección a algún apéndice o articulación del cuerpo o, indirectamente, adaptando dicho sistema a dispositivos vestibles o a sistemas utilizados por el usuario, como bastones [6], mochilas [7], sillas de ruedas [8] o zapatos [9,10], entre otros.…”

Section: Introductionunclassified

“…Tal es el caso del trabajo presentado por Sánchez [6], donde se propuso el uso de recolectores piezoeléctricos para aprovechar la energía mecánica mientras un sujeto usa un bastón durante la marcha. Por otro lado, Nguyen et al [8], propusieron un sistema de recolección de energía híbrido, el cual se adaptó a una silla de ruedas eléctrica para aprovechar la energía solar y la energía RF disponibles en el entorno circundante, complementando entre sí la falta de uno o del otro tipo de energía.…”

Section: Introductionunclassified

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Propuesta de un péndulo electromagnético para la recolección de energía en usuarios de dispositivos de soporte de la marcha

Rosales¹

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People with motor disabilities usually have slow movement patterns, which means that very little biomechanical energy can be harvested using wearable or portable sensors. In this work, an electromagnetic harvester is proposed to harvest energy during the gait of subjects using gait-support devices, in this case, a walker. The harvester consists of a simple pendulum where the suspended weight is formed by two neodymium permanent magnets. Three static coils connected in series have been arranged in such a way that their position coincides with the swinging movement of the suspended weight. So, when the pendulum is moved sideways from its resting, a gradient of the magnetic field is produced in each coil, generating an electromotive force. The performance of the proposed pendulum has been tested in bench conditions and in real conditions using a walker for the elderly. When the subject began or finished the gait with the walker, the pendulum moved sideways, making the magnets to move back and forth generating a peak-to-peak voltage of 2.2 V. This back-and-forth movement remains until the suspended weight reaches the equilibrium position due to the restoring force of the gravity. The generated voltage was not affected by the velocity of the gait, but by the beginning and ending of the gait. The proposed electromagnetic pendulum has demonstrated to be suitable to harvest energy from people with slow gait without attaching any sensor to the subject.

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Hybrid Solar-RF Energy Harvesting Systems for Electric Operated Wheelchairs

Cited by 7 publications

References 27 publications

Dual Piezoelectric Energy Investing and Harvesting Interface for High-Voltage Input

Dual Piezoelectric Energy Investing and Harvesting Interface for High-Voltage Input

The Hybrid Solar-RF Energy for Base Transceiver Stations

Propuesta de un péndulo electromagnético para la recolección de energía en usuarios de dispositivos de soporte de la marcha

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