Summary of RESEARCHERS DEVELOP MEMS VIBRATIONAL ENERGY HARVESTERS FOR IOT SYSTEMS
MEMS vibrational energy harvesters can power compact IoT sensing nodes by converting mechanical vibrations into electrical energy via electrostatic, electromagnetic, or piezoelectric mechanisms, enabling low-power transmit/receive scheduling and on-chip integration of sensors, radios, and harvesters to reduce dependence on bulky supplies like solar.
Parts used in the MEMS Vibrational Energy Harvesters for IoT Systems:
- Microelectromechanical systems (MEMS) devices and structures
- Sensors
- Actuators
- Electronic circuits for information processing
- Radio frequency communication circuits
- Antennas
- Energy harvesters (vibrational)
- Electrostatic induction conversion elements
- Electromagnetic induction conversion elements
- Piezoelectric conversion elements
IoT systems are very well known these days as they allow connection and exchange of data through the internet. The Internet of Things (IoT) systems consist of a network of sensors, actuators, software, and other technologies connected.
Due to increasing design specifications and the need for compactness, dependence on energy sources like solar is not feasible. We need compact solutions which can deliver enough power to our IoT circuits. IoT wireless sensors consume a peak power of around tens of milliwatt. But if we schedule the transmission and reception in some intervals, we can bring it in the order of a few hundred microwatts.
Microelectromechanical systems (MEMS) is the most suitable technology to realize IoT-sensing nodes because it enables integrated fabrication of sensors/actuators, electronic circuits for information processing and radio frequency communication, antennas, and energy harvesters on a single chip or in a package. Low power transmitter and receiver networks with onboard MEMs energy harvesting systems can independently generate power for themselves. In this way, the level of connection can be further developed without having to worry about power requirements. MEMS refers to Microelectromechanical systems. It is a technology that consists of micro-electro-mechanical devices and structures that are made using microfabrication. MEMS energy harvesting means taking advantage of vibrations and other mechanical effects and converting them into electrical power.
Hiroshi Toshiyoshi from the University of Tokyo and his colleagues recently published their study on MEMS vibrational energy harvesters. In this paper, researchers look into the fundamental mechanism to retrieve the power from physical vibrations by using microelectromechanical systems (MEMS) energy harvesters. They discuss the deliverable power they recorded and the mechano-electric power conversion techniques like electrostatic induction, electromagnetic induction, and piezoelectric effect.
Read more: RESEARCHERS DEVELOP MEMS VIBRATIONAL ENERGY HARVESTERS FOR IOT SYSTEMS
- What is the role of MEMS in IoT sensing nodes?
MEMS enable integrated fabrication of sensors, actuators, electronic processing, radios, antennas, and energy harvesters on a single chip or in a package. - Can MEMS energy harvesters power IoT devices independently?
Yes, low power transmitter and receiver networks with onboard MEMS energy harvesting systems can independently generate power for themselves. - How do MEMS energy harvesters convert vibrations to electrical power?
They use mechano-electric power conversion techniques such as electrostatic induction, electromagnetic induction, and the piezoelectric effect. - Why are solar solutions often not feasible for compact IoT designs?
Because increasing design specifications and the need for compactness make dependence on larger energy sources like solar not feasible. - What power levels do IoT wireless sensors consume and how can they be reduced?
IoT wireless sensors consume peak power of tens of milliwatts, but scheduling transmission and reception intervals can reduce average consumption to a few hundred microwatts. - Who conducted the recent study on MEMS vibrational energy harvesters?
Hiroshi Toshiyoshi from the University of Tokyo and his colleagues conducted the recent study. - What advantage does on-chip MEMS energy harvesting provide?
It allows independent power generation for low-power networks, enabling further development of connectivity without worrying about external power requirements.
