12 results on '"Huicong Liu"'
Search Results
2. Special Issue on Energy Harvesters and Self-Powered Sensors for Smart Electronics
- Author
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Qiongfeng Shi and Huicong Liu
- Subjects
n/a ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
In recent years, we have witnessed the revolutionary innovation and flourishing advancement of the Internet of things (IoT), which will maintain a strong momentum even more with the gradual rollout of the fifth generation (5G) wireless network and the rapid development of personal healthcare electronics [...]
- Published
- 2021
- Full Text
- View/download PDF
3. A Magnetic-Coupled Nonlinear Electromagnetic Generator with Both Wideband and High-Power Performance
- Author
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Manjuan Huang, Yunfei Li, Xiaowei Feng, Tianyi Tang, Huicong Liu, Tao Chen, and Lining Sun
- Subjects
vibration energy harvesting ,electromagnetic generator (EMG) ,nonlinear ,magnetic coupling ,wideband ,high performance ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
This paper proposed a high-performance magnetic-coupled nonlinear electromagnetic generator (MNL-EMG). A high-permeability iron core is incorporated to the coil. The strong coupling between the iron core and the vibrating magnets lead to significantly improved output power and a broadened operating bandwidth. The magnetic force of the iron core to the permanent magnets and the magnetic flux density inside the iron core are simulated, and the dimension parameters of the MNL-EMG are optimized. Under acceleration of 1.5 g, the MNL-EMG can maintain high output performance in a wide frequency range of 17~30 Hz, which is 4.3 times wider than that of linear electromagnetic generator (EMG) without an iron core. The maximum output power of MNL-EMG reaches 174 mW under the optimal load of 35 Ω, which is higher than those of most vibration generators with frequency less than 30 Hz. The maximum 360 parallel-connected LEDs were successfully lit by the prototype. Moreover, the prototype has an excellent charging performance such that a 1.2 V, 900 mAh Ni-MH battery was charged from 0.95 V to 0.98 V in 240 s. Both the simulation and experiments verify that the proposed bistable EMG device based on magnetic coupling has advantages of wide operating bandwidth and high output power, which could be sufficient to power micro electronic devices.
- Published
- 2021
- Full Text
- View/download PDF
4. An Electromagnetic MEMS Energy Harvester Array with Multiple Vibration Modes
- Author
-
Huicong Liu, Tao Chen, Lining Sun, and Chengkuo Lee
- Subjects
MEMS ,energy harvester ,electromagnetic ,multi-frequency ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
This paper reports the design, micromachining and characterization of an array of electromagnetic energy harvesters (EHs) with multiple frequency peaks. The authors present the combination of three multi-modal spring-mass structures so as to realize at least nine resonant peaks within a single microelectromechanical systems (MEMS) chip. It is assembled with permanent magnet to show an electromagnetic-based energy harvesting capability. This is the first demonstration of multi-frequency MEMS EH existing with more than three resonant peaks within a limited frequency range of 189 to 662 Hz. It provides a more effective approach to harvest energy from the vibration sources of multiple frequency peaks.
- Published
- 2015
- Full Text
- View/download PDF
5. A Low-Frequency MEMS Piezoelectric Energy Harvesting System Based on Frequency Up-Conversion Mechanism
- Author
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Manjuan Huang, Cheng Hou, Yunfei Li, Huicong Liu, Fengxia Wang, Tao Chen, Zhan Yang, Gang Tang, and Lining Sun
- Subjects
MEMS ,piezoelectric vibration energy harvester ,frequency up-conversion mechanism ,impact ,PZT thick film ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
This paper proposes an impact-based micro piezoelectric energy harvesting system (PEHS) working with the frequency up-conversion mechanism. The PEHS consists of a high-frequency straight piezoelectric cantilever (SPC), a low-frequency S-shaped stainless-steel cantilever (SSC), and supporting frames. During the vibration, the frequency up-conversion behavior is realized through the impact between the bottom low-frequency cantilever and the top high-frequency cantilever. The SPC used in the system is fabricated using a new micro electromechanical system (MEMS) fabrication process for a piezoelectric thick film on silicon substrate. The output performances of the single SPC and the PEHS under different excitation accelerations are tested. In the experiment, the normalized power density of the PEHS is 0.216 μW·g−1·Hz−1·cm−3 at 0.3 g acceleration, which is 34 times higher than that of the SPC at the same acceleration level of 0.3 g. The PEHS can improve the output power under the low frequency and low acceleration scenario.
- Published
- 2019
- Full Text
- View/download PDF
6. Development of a Thermoelectric and Electromagnetic Hybrid Energy Harvester from Water Flow in an Irrigation System
- Author
-
Huicong Liu, Jiankang Zhang, Qiongfeng Shi, Tianyiyi He, Tao Chen, Lining Sun, Jan A Dziuban, and Chengkuo Lee
- Subjects
hybrid energy harvester ,water flow ,thermoelectric ,electromagnetic ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
A hybrid energy harvester is presented in this paper to harvest energy from water flow motion and temperature difference in an irrigating pipe at the same time. The harvester is based on the integration of thermoelectric and electromagnetic mechanisms. To harvest the water flow motion, a turbine fan with magnets that are attached on the blades is placed inside of the water pipe. Multiple coils turn the water flow energy into electricity with the rotation of the turbine. The thermoelectric generators (TEGs) are attached around the pipe, so as to harvest energy due to temperature difference. For a maximum temperature difference of 55 °C (hot side 80 °C and room temperature 25 °C), twelve serial-connected TEGs can generate voltage up to 0.346 V. Under a load resistance of 20 Ώ, the power output of 1.264 mW can be achieved. For a maximum water flow rate of 49.9 L/min, the electromagnetic generator (EMG) can produce an open circuit voltage of 0.911 V. The EMG can be potentially used as a water flow meter due to the linear relationship between water flow rate and output voltage. Under the joint action of TEG and EMG, the maximum terminal voltage for TEG is 66 mV and for EMG is 241 mV at load resistances of 10 and 100 Ώ, respectively, resulting in a corresponding power output of 0.435 and 0.584 mW.
- Published
- 2018
- Full Text
- View/download PDF
7. A PZT Actuated Triple-Finger Gripper for Multi-Target Micromanipulation
- Author
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Tao Chen, Yaqiong Wang, Zhan Yang, Huicong Liu, Jinyong Liu, and Lining Sun
- Subjects
micromanipulation ,triple-finger ,micro-gripper ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
This paper presents a triple-finger gripper driven by a piezoceramic (PZT) transducer for multi-target micromanipulation. The gripper consists of three fingers assembled on adjustable pedestals with flexible hinges for a large adjustable range. Each finger has a PZT actuator, an amplifying structure, and a changeable end effector. The moving trajectories of single and double fingers were calculated and finite element analyses were performed to verify the reliability of the structures. In the gripping experiment, various end effectors of the fingers such as tungsten probes and fibers were tested, and different micro-objects such as glass hollow spheres and iron spheres with diameters ranging from 10 to 800 μm were picked and released. The output resolution is 145 nm/V, and the driven displacement range of the gripper is 43.4 μm. The PZT actuated triple-finger gripper has superior adaptability, high efficiency, and a low cost.
- Published
- 2017
- Full Text
- View/download PDF
8. A Magnetic-Coupled Nonlinear Electromagnetic Generator with Both Wideband and High-Power Performance
- Author
-
Li Yunfei, Huicong Liu, Manjuan Huang, Lining Sun, Tianyi Tang, Xiaowei Feng, and Tao Chen
- Subjects
Materials science ,02 engineering and technology ,magnetic coupling ,01 natural sciences ,Article ,vibration energy harvesting ,0103 physical sciences ,TJ1-1570 ,Mechanical engineering and machinery ,Electrical and Electronic Engineering ,Wideband ,010302 applied physics ,electromagnetic generator (EMG) ,business.industry ,Mechanical Engineering ,Bandwidth (signal processing) ,Electrical engineering ,021001 nanoscience & nanotechnology ,Inductive coupling ,Magnetic field ,Power (physics) ,Magnetic core ,Control and Systems Engineering ,Electromagnetic coil ,Magnet ,nonlinear ,0210 nano-technology ,business ,wideband ,high performance - Abstract
This paper proposed a high-performance magnetic-coupled nonlinear electromagnetic generator (MNL-EMG). A high-permeability iron core is incorporated to the coil. The strong coupling between the iron core and the vibrating magnets lead to significantly improved output power and a broadened operating bandwidth. The magnetic force of the iron core to the permanent magnets and the magnetic flux density inside the iron core are simulated, and the dimension parameters of the MNL-EMG are optimized. Under acceleration of 1.5 g, the MNL-EMG can maintain high output performance in a wide frequency range of 17~30 Hz, which is 4.3 times wider than that of linear electromagnetic generator (EMG) without an iron core. The maximum output power of MNL-EMG reaches 174 mW under the optimal load of 35 Ω, which is higher than those of most vibration generators with frequency less than 30 Hz. The maximum 360 parallel-connected LEDs were successfully lit by the prototype. Moreover, the prototype has an excellent charging performance such that a 1.2 V, 900 mAh Ni-MH battery was charged from 0.95 V to 0.98 V in 240 s. Both the simulation and experiments verify that the proposed bistable EMG device based on magnetic coupling has advantages of wide operating bandwidth and high output power, which could be sufficient to power micro electronic devices.
- Published
- 2021
9. A Low-Frequency MEMS Piezoelectric Energy Harvesting System Based on Frequency Up-Conversion Mechanism
- Author
-
Huicong Liu, Zhan Yang, Gang Tang, Manjuan Huang, Cheng Hou, Lining Sun, Wang Fengxia, Yunfei Li, and Tao Chen
- Subjects
Cantilever ,Materials science ,020209 energy ,Acoustics ,lcsh:Mechanical engineering and machinery ,02 engineering and technology ,Low frequency ,Article ,Acceleration ,PZT thick film ,0202 electrical engineering, electronic engineering, information engineering ,lcsh:TJ1-1570 ,Electrical and Electronic Engineering ,Power density ,piezoelectric vibration energy harvester ,Microelectromechanical systems ,Mechanical Engineering ,021001 nanoscience & nanotechnology ,Piezoelectricity ,Vibration ,MEMS ,Control and Systems Engineering ,impact ,frequency up-conversion mechanism ,0210 nano-technology ,Energy harvesting - Abstract
This paper proposes an impact-based micro piezoelectric energy harvesting system (PEHS) working with the frequency up-conversion mechanism. The PEHS consists of a high-frequency straight piezoelectric cantilever (SPC), a low-frequency S-shaped stainless-steel cantilever (SSC), and supporting frames. During the vibration, the frequency up-conversion behavior is realized through the impact between the bottom low-frequency cantilever and the top high-frequency cantilever. The SPC used in the system is fabricated using a new micro electromechanical system (MEMS) fabrication process for a piezoelectric thick film on silicon substrate. The output performances of the single SPC and the PEHS under different excitation accelerations are tested. In the experiment, the normalized power density of the PEHS is 0.216 &mu, W·, g&minus, 1·, Hz&minus, cm&minus, 3 at 0.3 g acceleration, which is 34 times higher than that of the SPC at the same acceleration level of 0.3 g. The PEHS can improve the output power under the low frequency and low acceleration scenario.
- Published
- 2019
10. Development of a Thermoelectric and Electromagnetic Hybrid Energy Harvester from Water Flow in an Irrigation System
- Author
-
Lining Sun, Tao Chen, Zhang Jiankang, Qiongfeng Shi, Huicong Liu, Jan Dziuban, Tianyiyi He, and Chengkuo Lee
- Subjects
Materials science ,Water flow ,Open-circuit voltage ,020209 energy ,Mechanical Engineering ,lcsh:Mechanical engineering and machinery ,water flow ,02 engineering and technology ,Mechanics ,021001 nanoscience & nanotechnology ,thermoelectric ,Turbine ,Article ,Thermoelectric generator ,electromagnetic ,Control and Systems Engineering ,Magnet ,Thermoelectric effect ,0202 electrical engineering, electronic engineering, information engineering ,hybrid energy harvester ,Metre ,lcsh:TJ1-1570 ,Electrical and Electronic Engineering ,0210 nano-technology ,Voltage - Abstract
A hybrid energy harvester is presented in this paper to harvest energy from water flow motion and temperature difference in an irrigating pipe at the same time. The harvester is based on the integration of thermoelectric and electromagnetic mechanisms. To harvest the water flow motion, a turbine fan with magnets that are attached on the blades is placed inside of the water pipe. Multiple coils turn the water flow energy into electricity with the rotation of the turbine. The thermoelectric generators (TEGs) are attached around the pipe, so as to harvest energy due to temperature difference. For a maximum temperature difference of 55 °, C (hot side 80 °, C and room temperature 25 °, C), twelve serial-connected TEGs can generate voltage up to 0.346 V. Under a load resistance of 20 Ώ, the power output of 1.264 mW can be achieved. For a maximum water flow rate of 49.9 L/min, the electromagnetic generator (EMG) can produce an open circuit voltage of 0.911 V. The EMG can be potentially used as a water flow meter due to the linear relationship between water flow rate and output voltage. Under the joint action of TEG and EMG, the maximum terminal voltage for TEG is 66 mV and for EMG is 241 mV at load resistances of 10 and 100 Ώ, respectively, resulting in a corresponding power output of 0.435 and 0.584 mW.
- Published
- 2018
11. An Electromagnetic MEMS Energy Harvester Array with Multiple Vibration Modes
- Author
-
Tao Chen, Chengkuo Lee, Huicong Liu, and Sun Lining
- Subjects
Microelectromechanical systems ,Engineering ,business.industry ,lcsh:Mechanical engineering and machinery ,Mechanical Engineering ,Acoustics ,Electrical engineering ,Chip ,energy harvester ,Electromagnetic radiation ,Vibration ,MEMS ,Surface micromachining ,electromagnetic ,Control and Systems Engineering ,Normal mode ,multi-frequency ,lcsh:TJ1-1570 ,Electrical and Electronic Engineering ,business ,Energy harvesting ,Energy (signal processing) - Abstract
This paper reports the design, micromachining and characterization of an array of electromagnetic energy harvesters (EHs) with multiple frequency peaks. The authors present the combination of three multi-modal spring-mass structures so as to realize at least nine resonant peaks within a single microelectromechanical systems (MEMS) chip. It is assembled with permanent magnet to show an electromagnetic-based energy harvesting capability. This is the first demonstration of multi-frequency MEMS EH existing with more than three resonant peaks within a limited frequency range of 189 to 662 Hz. It provides a more effective approach to harvest energy from the vibration sources of multiple frequency peaks.
- Published
- 2015
12. A PZT Actuated Triple-Finger Gripper for Multi-Target Micromanipulation
- Author
-
Lining Sun, Zhan Yang, Liu Jinyong, Yaqiong Wang, Tao Chen, and Huicong Liu
- Subjects
Engineering ,lcsh:Mechanical engineering and machinery ,Acoustics ,Hinge ,02 engineering and technology ,01 natural sciences ,Article ,Displacement (vector) ,law.invention ,triple-finger ,Multi target ,law ,lcsh:TJ1-1570 ,Electrical and Electronic Engineering ,business.industry ,Mechanical Engineering ,010401 analytical chemistry ,Ranging ,Structural engineering ,micro-gripper ,021001 nanoscience & nanotechnology ,Robot end effector ,Finite element method ,0104 chemical sciences ,body regions ,Transducer ,Control and Systems Engineering ,SPHERES ,0210 nano-technology ,business ,micromanipulation - Abstract
This paper presents a triple-finger gripper driven by a piezoceramic (PZT) transducer for multi-target micromanipulation. The gripper consists of three fingers assembled on adjustable pedestals with flexible hinges for a large adjustable range. Each finger has a PZT actuator, an amplifying structure, and a changeable end effector. The moving trajectories of single and double fingers were calculated and finite element analyses were performed to verify the reliability of the structures. In the gripping experiment, various end effectors of the fingers such as tungsten probes and fibers were tested, and different micro-objects such as glass hollow spheres and iron spheres with diameters ranging from 10 to 800 μm were picked and released. The output resolution is 145 nm/V, and the driven displacement range of the gripper is 43.4 μm. The PZT actuated triple-finger gripper has superior adaptability, high efficiency, and a low cost.
- Published
- 2017
- Full Text
- View/download PDF
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