Abstract:
This article presents the frequency response of a surface acoustic wave (SAW) sensor for current measurements. The SAW sensor exploits the Love waves of a magnetostrictiv...Show MoreMetadata
Abstract:
This article presents the frequency response of a surface acoustic wave (SAW) sensor for current measurements. The SAW sensor exploits the Love waves of a magnetostrictively coated delay line. The focus of this article lies on the frequency response of the sensor, which shows a very wide bandwidth. The delay time τD is the time an acoustic wave needs to traverse the delay line. Since the acoustic wave is modulated during the whole duration of the delay line crossing, τD is comparable to the integration time of a sample-and-hold device. The signal measured with the SAW sensor is averaged over the delay time. Therefore, undersampling behavior occurs for signal frequencies approaching 1/τD. A mathematical model of their frequency response up to several megahertz was developed and compared with measurements of two SAW sensors with different delay line lengths.
Published in: IEEE Sensors Letters ( Volume: 3, Issue: 10, October 2019)
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- IEEE Keywords
- Index Terms
- Frequency Response ,
- Delay Line ,
- Surface Acoustic Wave ,
- Surface Acoustic Wave Delay ,
- Time Delay ,
- Acoustic Waves ,
- Sensor Response ,
- Love Wave ,
- Magnetic Field ,
- Dynamic Range ,
- Phase Shift ,
- Alternating Current ,
- Carrier Frequency ,
- Analog-to-digital Converter ,
- Wave Velocity ,
- Changes In Velocity ,
- Printed Circuit Board ,
- Ratio Measurements ,
- Magnetic Flux ,
- Phase Modulation ,
- Current Sensor ,
- Giant Magnetoresistance ,
- Ion Beam Etching ,
- Biot-Savart ,
- Lock-in Amplifier ,
- Bias Magnetic Field ,
- Amplitude Phase ,
- Non-invasive Sensors ,
- Impedance ,
- Shift Of Signal
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Frequency Response ,
- Delay Line ,
- Surface Acoustic Wave ,
- Surface Acoustic Wave Delay ,
- Time Delay ,
- Acoustic Waves ,
- Sensor Response ,
- Love Wave ,
- Magnetic Field ,
- Dynamic Range ,
- Phase Shift ,
- Alternating Current ,
- Carrier Frequency ,
- Analog-to-digital Converter ,
- Wave Velocity ,
- Changes In Velocity ,
- Printed Circuit Board ,
- Ratio Measurements ,
- Magnetic Flux ,
- Phase Modulation ,
- Current Sensor ,
- Giant Magnetoresistance ,
- Ion Beam Etching ,
- Biot-Savart ,
- Lock-in Amplifier ,
- Bias Magnetic Field ,
- Amplitude Phase ,
- Non-invasive Sensors ,
- Impedance ,
- Shift Of Signal
- Author Keywords