PEtra: A Flexible and Open-Source PE Loop Tracer for Polymer Thin-Film Transducers
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913559135387648 |
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| author | Wessner, Marc-Andre Villani, Federico Papa, Sofia Keller, Kirill Ferrari, Laura Greco, Francesco Benini, Luca Leitner, Christoph |
| author_facet | Wessner, Marc-Andre Villani, Federico Papa, Sofia Keller, Kirill Ferrari, Laura Greco, Francesco Benini, Luca Leitner, Christoph |
| contents | Accurate characterization of ferroelectric properties in polymer piezoelectrics is critical for optimizing the performance of flexible and wearable ultrasound transducers, such as screen-printed PVDF devices. Standard charge measurement techniques, like the Sawyer-Tower circuit, often fall short when applied to ferroelectric polymers due to low-frequency leakage. In this work, we present PEtra, an open-source and versatile piezoelectric loop tracer. PEtra employs a transimpedance amplifier (LMP7721, TI) to convert picoampere-level currents into measurable voltages, covering a frequency range of 0.1 Hz to 5 Hz for a gain setting of 10^7 V/A, and 0.1 Hz to 200 Hz for gain settings between 10^3 V/A to 10^6 V/A (10-fold increments). We demonstrate through simulations and experimental validations that PEtra achieves a sensitivity down to 2 pA, effectively addressing the limitations of traditional charge measurement methods. Compared to the Sawyer-Tower circuit, PEtra directly amplifies currents without the need for a reference capacitor. As a result, it is less susceptible to leakage and can operate at lower frequencies, improving measurement accuracy and reliability. PEtra's design is fully open source, offering researchers and engineers a versatile tool to drive advancements in flexible PVDF transducer technology. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_16581 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | PEtra: A Flexible and Open-Source PE Loop Tracer for Polymer Thin-Film Transducers Wessner, Marc-Andre Villani, Federico Papa, Sofia Keller, Kirill Ferrari, Laura Greco, Francesco Benini, Luca Leitner, Christoph Systems and Control Instrumentation and Detectors Accurate characterization of ferroelectric properties in polymer piezoelectrics is critical for optimizing the performance of flexible and wearable ultrasound transducers, such as screen-printed PVDF devices. Standard charge measurement techniques, like the Sawyer-Tower circuit, often fall short when applied to ferroelectric polymers due to low-frequency leakage. In this work, we present PEtra, an open-source and versatile piezoelectric loop tracer. PEtra employs a transimpedance amplifier (LMP7721, TI) to convert picoampere-level currents into measurable voltages, covering a frequency range of 0.1 Hz to 5 Hz for a gain setting of 10^7 V/A, and 0.1 Hz to 200 Hz for gain settings between 10^3 V/A to 10^6 V/A (10-fold increments). We demonstrate through simulations and experimental validations that PEtra achieves a sensitivity down to 2 pA, effectively addressing the limitations of traditional charge measurement methods. Compared to the Sawyer-Tower circuit, PEtra directly amplifies currents without the need for a reference capacitor. As a result, it is less susceptible to leakage and can operate at lower frequencies, improving measurement accuracy and reliability. PEtra's design is fully open source, offering researchers and engineers a versatile tool to drive advancements in flexible PVDF transducer technology. |
| title | PEtra: A Flexible and Open-Source PE Loop Tracer for Polymer Thin-Film Transducers |
| topic | Systems and Control Instrumentation and Detectors |
| url | https://arxiv.org/abs/2410.16581 |