ULTRA LOW POWER HYBRID MICRO ENERGY HARVESTER USING RF, THERMAL AND VIBRATION FOR BIOMEDICAL DEVICES

The objective of this research is to design ultra-low power Hybrid Micro Energy Harvester (HMEH) circuit using hybrid inputs of radio frequency (RF), thermal and vibration for biomedical devices. In the HMEH architecture, three input sources (RF, thermal and vibration) are combined in parallel to solve the limitation issue of a single source energy harvester and to improve the system performance. Energy will be scavenged from the human body for thermal and vibration sources by converting directly temperature difference and human movement to electrical energy. The inputs are set to 0.02V and 0.5V for thermal and vibration respectively with the frequency of 1 kHz. Meanwhile, RF source is absorbed from radio wave propagation in our surrounding. For this work, the frequency is set to 915MHz and the output voltages for input ranges of-20dBm to 5dBm are recorded. The performance analysis of the HMEH is divided into two; thermal and vibration harvester circuit and RF harvester circuit. These proposed HMEH circuits are modeled, designed and simulated using PSPICE software. Vibration produces AC input and will be converted to DC using a rectifier. A comparator is used to compare the two sources (thermal and vibration) and boost converter is proposed to step-up these small input sources. Meanwhile, due to RF large frequency, the voltage multiplier is practical for both rectify and step up the input instead of the boost converter. LC resonant network is used to amplify low ambient input of RF passively before it goes to 4–stages voltage multiplier. The proposed HMEH able to achieve the output ranges of 2.0 to 4.0V with 1MΩ load. The results obtained in this research work shows that the proposed design able to produce sufficient voltage for biomedical application requirement which lies between 2.0–4.0 V from the ambient input of 0.02 to 0.5V for thermal and vibration while-9dBm for RF signal.

[1]  Zahriladha Zakaria,et al.  Current Developments of RF Energy Harvesting System for Wireless Sensor Networks , 2013 .

[2]  Jahariah Sampe,et al.  Parametric analysis of boost converter for energy harvesting using piezoelectric for micro devices , 2014, 2014 IEEE International Conference on Semiconductor Electronics (ICSE2014).

[3]  K. K. A. Devi,et al.  Optimization of the Voltage Doubler Stages in an RF-DC Convertor Module for Energy Harvesting , 2012 .

[4]  Neil Goldsman,et al.  Voltage Doubler Design Procedure for Low Ambient RF Energy Harvesting Applications , 2013 .

[5]  Yuan Rao,et al.  An Input-Powered Vibrational Energy Harvesting Interface Circuit With Zero Standby Power , 2011, IEEE Transactions on Power Electronics.

[6]  Giuseppe Palmisano,et al.  A 90-nm CMOS Threshold-Compensated RF Energy Harvester , 2011, IEEE Journal of Solid-State Circuits.

[7]  Kai Strunz,et al.  A 20 mV Input Boost Converter With Efficient Digital Control for Thermoelectric Energy Harvesting , 2010, IEEE Journal of Solid-State Circuits.

[8]  Edgar Sánchez-Sinencio,et al.  Boost Converter With Dynamic Input Impedance Matching for Energy Harvesting With Multi-Array Thermoelectric Generators , 2014, IEEE Transactions on Industrial Electronics.

[9]  Jahariah Sampe,et al.  Architecture of ultra-low-power micro energy harvester using hybrid input for biomedical devices , 2015 .

[10]  Mohammed Ismail,et al.  Characterization of Human Body-Based Thermal and Vibration Energy Harvesting for Wearable Devices , 2014, IEEE Journal on Emerging and Selected Topics in Circuits and Systems.

[11]  Prusayon Nintanavongsa,et al.  Design Optimization and Implementation for RF Energy Harvesting Circuits , 2012, IEEE Journal on Emerging and Selected Topics in Circuits and Systems.

[12]  K. Strunz,et al.  20mV input boost converter for thermoelectric energy harvesting , 2009, 2009 Symposium on VLSI Circuits.

[13]  Jahariah Sampe,et al.  Architecture of Ultra Low Power Micro Energy Harvester Using RF Signal for Health Care Monitoring System: A Review , 2015 .

[14]  Md Shabiul Islam,et al.  Modelling of hybrid energy harvester with DC-DC boost converter using arbitary input sources for ultra-low-power micro-devices , 2014, 2014 IEEE International Conference on Semiconductor Electronics (ICSE2014).

[15]  Jahariah Sampe,et al.  Optimization of RF- DC converter in micro energy harvester using voltage boosting network and bulk modulation technique for biomedical devices , 2015, 2015 IEEE Regional Symposium on Micro and Nanoelectronics (RSM).

[16]  Changzhi Li,et al.  An Energy Harvesting System using 3-stage voltage multiplier and MPVD Charge Pump for wireless sensor networks , 2013, 2013 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet).

[17]  Masuri Othman,et al.  Designing a Battery-Less Piezoelectric based Energy Harvesting Interface Circuit with 300 mV Startup Voltage , 2013 .

[18]  Jahariah Sampe,et al.  Designing a boost converter of micro energy harvester using thermal and vibration input for biomedical devices , 2015, 2015 IEEE Regional Symposium on Micro and Nanoelectronics (RSM).

[19]  Hua Yu,et al.  A new hybrid piezoelectric-electromagnetic micro vibration energy harvester , 2014, 2014 IEEE International Conference on Electron Devices and Solid-State Circuits.