A novel power source for miniature sensors, comprising an RF-recharged microbattery is presented.... more A novel power source for miniature sensors, comprising an RF-recharged microbattery is presented. The microbattery comprises a silicon wafer-fabricated aqueous Ni-Zn microbattery that is capable of delivering ∼10 mA for a few seconds. In this paper, we present charge/discharge test results on the microbattery itself and details of the RF charger circuit design and experimental test results on fabricated RF charger boards. Finally, we present test results on a sensor platform comprising an Analog Devices MEMS accelerometer, a microchip microcontroller, and an RF transmitter, all powered by the RF recharged microbattery.
Doppler-limited laser excitation spectroscopy employing narrow-band fluorescence detection was us... more Doppler-limited laser excitation spectroscopy employing narrow-band fluorescence detection was used to obtain a rotational and vibrational analysis in the (0, 0) and (1, 1) bands of the A2Π- X2Σ + system and the (4, 2) (3, 1), (0, 0), (0, 1), (1, 2), (2, 3), and (3, 4) bands of the B2Σ +- X2Σ + system of CaI. The A and B states are deperturbed to obtain spectroscopic constants and Franck-Condon factors. Deperturbation was necessary because of the small separation of the A and B states relative to the A ˜ B interaction strength and the A2Π spin-orbit splitting. The main deperturbed constants (in cm -1) are
Stimulated emission pumping (SEP) is a new method for sub‐Doppler spectroscopy and efficient stat... more Stimulated emission pumping (SEP) is a new method for sub‐Doppler spectroscopy and efficient state‐selective preparation of highly excited rotationalvibrational levels of small molecules. The sensitivity of SEP has been examined by exciting the I(B 0X Σ) 170 P(38) line and ...
Stimulated emission pumping (SEP) is a new method for sub‐Doppler spectroscopy and efficient stat... more Stimulated emission pumping (SEP) is a new method for sub‐Doppler spectroscopy and efficient state‐selective preparation of highly excited rotationalvibrational levels of small molecules. The sensitivity of SEP has been examined by exciting the I(B 0X Σ) 170 P(38) line and ...
A number of electrolytes were evaluated as co-spray additives for plasma spraying of pyrite powde... more A number of electrolytes were evaluated as co-spray additives for plasma spraying of pyrite powder to form composite cathodes for use in thermally activated batteries. Initial work showed that the LiCl-KCl eutectic electrolyte was effective for this purpose. In this paper, the use of alternative electrolytes is described and the effects on performance of the plasma-sprayed cathodes in Li(Si)/FeS 2
Microelectromechanical (MEMS) sensors often have low power requirements that may be provided by t... more Microelectromechanical (MEMS) sensors often have low power requirements that may be provided by the combination of an energy scavenger (e.g., a solar cell) and a rechargeable microbattery (“battery”) made using integrated circuit fabrication methods. While rechargeable microbatteries and solar cells have been previously demonstrated, the development of a microcharge/discharge controller has not. In this paper we present a novel, fuzzy logic-based controller that allows control of the charge/discharge of microbatteries. A breadboard implementation of the controller and its integration with a solar cell and microbattery is presented. The circuit topology of the microbattery controller is based on a buck converter design. During charging, the solar cell's operating point is adjusted by modulating the duty cycle of the buck converter's switching MOSFET using a fuzzy logic control algorithm to optimally charge the microbattery. Charge/discharge data on the microbatteries and current-voltage characteristics of the solar cell are presented and the fuzzy logic model development for the charge control is also presented
Non-destructive testing of thermal batteries without activating them is a challenging proposition... more Non-destructive testing of thermal batteries without activating them is a challenging proposition. Molten salt thermal batteries are activated by raising their temperature to above the melting point of the salt constituting the electrolyte. One approach that we have ...
AbstractMiniature, remote, autonomous sensors generally have a relatively large power supply com... more AbstractMiniature, remote, autonomous sensors generally have a relatively large power supply compared to the size of the sensor and sensor conditioning electronic circuitry. An integrated micropower supply made in a silicon wafer offers the prospect of shrinking the power ...
... Rodney LaFollette Bipolar Technologies Provo, UT, USA Rmlafollette@aol.com Pritpal Singh Vill... more ... Rodney LaFollette Bipolar Technologies Provo, UT, USA Rmlafollette@aol.com Pritpal Singh Villanova University Villanova, PA, USA singh@ece.villanova.edu John Broadhead David Reisner US Nanocorp Farmington, CT, USA Usnanocorp@aol.com ...
Automotive start, light, ignition (SLI) lead acid batteries are prone to capacity loss due to low... more Automotive start, light, ignition (SLI) lead acid batteries are prone to capacity loss due to low temperatures, self-discharge, sulfation and shorting of plates. Monitoring and charge control of these batteries can be improved by using the concept of a smart battery system (SBS). ...
A novel power source for miniature sensors, comprising an RF-recharged microbattery is presented.... more A novel power source for miniature sensors, comprising an RF-recharged microbattery is presented. The microbattery comprises a silicon wafer-fabricated aqueous Ni-Zn microbattery that is capable of delivering ∼10 mA for a few seconds. In this paper, we present charge/discharge test results on the microbattery itself and details of the RF charger circuit design and experimental test results on fabricated RF charger boards. Finally, we present test results on a sensor platform comprising an Analog Devices MEMS accelerometer, a microchip microcontroller, and an RF transmitter, all powered by the RF recharged microbattery.
Doppler-limited laser excitation spectroscopy employing narrow-band fluorescence detection was us... more Doppler-limited laser excitation spectroscopy employing narrow-band fluorescence detection was used to obtain a rotational and vibrational analysis in the (0, 0) and (1, 1) bands of the A2Π- X2Σ + system and the (4, 2) (3, 1), (0, 0), (0, 1), (1, 2), (2, 3), and (3, 4) bands of the B2Σ +- X2Σ + system of CaI. The A and B states are deperturbed to obtain spectroscopic constants and Franck-Condon factors. Deperturbation was necessary because of the small separation of the A and B states relative to the A ˜ B interaction strength and the A2Π spin-orbit splitting. The main deperturbed constants (in cm -1) are
Stimulated emission pumping (SEP) is a new method for sub‐Doppler spectroscopy and efficient stat... more Stimulated emission pumping (SEP) is a new method for sub‐Doppler spectroscopy and efficient state‐selective preparation of highly excited rotationalvibrational levels of small molecules. The sensitivity of SEP has been examined by exciting the I(B 0X Σ) 170 P(38) line and ...
Stimulated emission pumping (SEP) is a new method for sub‐Doppler spectroscopy and efficient stat... more Stimulated emission pumping (SEP) is a new method for sub‐Doppler spectroscopy and efficient state‐selective preparation of highly excited rotationalvibrational levels of small molecules. The sensitivity of SEP has been examined by exciting the I(B 0X Σ) 170 P(38) line and ...
A number of electrolytes were evaluated as co-spray additives for plasma spraying of pyrite powde... more A number of electrolytes were evaluated as co-spray additives for plasma spraying of pyrite powder to form composite cathodes for use in thermally activated batteries. Initial work showed that the LiCl-KCl eutectic electrolyte was effective for this purpose. In this paper, the use of alternative electrolytes is described and the effects on performance of the plasma-sprayed cathodes in Li(Si)/FeS 2
Microelectromechanical (MEMS) sensors often have low power requirements that may be provided by t... more Microelectromechanical (MEMS) sensors often have low power requirements that may be provided by the combination of an energy scavenger (e.g., a solar cell) and a rechargeable microbattery (“battery”) made using integrated circuit fabrication methods. While rechargeable microbatteries and solar cells have been previously demonstrated, the development of a microcharge/discharge controller has not. In this paper we present a novel, fuzzy logic-based controller that allows control of the charge/discharge of microbatteries. A breadboard implementation of the controller and its integration with a solar cell and microbattery is presented. The circuit topology of the microbattery controller is based on a buck converter design. During charging, the solar cell's operating point is adjusted by modulating the duty cycle of the buck converter's switching MOSFET using a fuzzy logic control algorithm to optimally charge the microbattery. Charge/discharge data on the microbatteries and current-voltage characteristics of the solar cell are presented and the fuzzy logic model development for the charge control is also presented
Non-destructive testing of thermal batteries without activating them is a challenging proposition... more Non-destructive testing of thermal batteries without activating them is a challenging proposition. Molten salt thermal batteries are activated by raising their temperature to above the melting point of the salt constituting the electrolyte. One approach that we have ...
AbstractMiniature, remote, autonomous sensors generally have a relatively large power supply com... more AbstractMiniature, remote, autonomous sensors generally have a relatively large power supply compared to the size of the sensor and sensor conditioning electronic circuitry. An integrated micropower supply made in a silicon wafer offers the prospect of shrinking the power ...
... Rodney LaFollette Bipolar Technologies Provo, UT, USA Rmlafollette@aol.com Pritpal Singh Vill... more ... Rodney LaFollette Bipolar Technologies Provo, UT, USA Rmlafollette@aol.com Pritpal Singh Villanova University Villanova, PA, USA singh@ece.villanova.edu John Broadhead David Reisner US Nanocorp Farmington, CT, USA Usnanocorp@aol.com ...
Automotive start, light, ignition (SLI) lead acid batteries are prone to capacity loss due to low... more Automotive start, light, ignition (SLI) lead acid batteries are prone to capacity loss due to low temperatures, self-discharge, sulfation and shorting of plates. Monitoring and charge control of these batteries can be improved by using the concept of a smart battery system (SBS). ...
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