SAW torque sensor for marine applications

Kalinin, V.; Leigh, A.; Stopps, Alexander; Hanssen, Stefan Blom

doi:10.1109/fcs.2017.8088889

Cited by 12 publications

(9 citation statements)

References 3 publications

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“…Therefore, usually, the measurands are functions of resonant frequencies by utilizing WP-SAW resonator sensors. WP-SAW resonators have been developed for industrial applications, e.g., wind turbines [18], marine applications [19], automotive applications [20], etc. They have been utilized for monitoring temperature, strain, torque, pressure [21], etc.…”

Section: State Of the Art In Wp-saw Sensorsmentioning

confidence: 99%

Improving Water Pressure Measurement Using Temperature-Compensated Wireless Passive SAW Bidirectional RDL Pressure Sensor

Tang

Gao

et al. 2022

IEEE Trans. Instrum. Meas.

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Currently pressure sensors utilized for water pressure measurement need batteries for direct power supply. However, batteries are lifespan-limited and not so reliable in the buried water pipe environment. The maintenance work due to battery failures leads to high cost to utility owners. Wireless passive surface acoustic wave (WP-SAW) sensors do not need direct power supply from batteries and can work in harsh environment. They are low-cost and compatible with microelectromechanical systems (MEMS) technologies. This study investigates a temperature-compensated WP-SAW bidirectional reflective delay line (RDL) pressure sensor and its feasibility in improving water pressure measurement. The linear temperaturecompensated pressure sensing functional model between the output phase shifts and the pressure change is established theoretically and verified by experiments. An experimental framework for testing the sensor node is built. The water pressure sensing adaptor is proposed. Experimental results: the experimental data show good linearities, which fits the established functional relationship; the numerical functional relationship has been derived and expressed; the sensor node has a good performance in the range of pressure difference from 0 to 0.5 MPa, which meets the normal 28-meter water pressure sensing requirements; the accuracy of this sensor is 7.22 kPa, which can be utilized for the water pressure sensing tasks in water distribution systems.

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Section: State Of the Art In Wp-saw Sensorsmentioning

confidence: 99%

Improving Water Pressure Measurement Using Temperature-Compensated Wireless Passive SAW Bidirectional RDL Pressure Sensor

Tang

Gao

et al. 2022

IEEE Trans. Instrum. Meas.

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“…Surface acoustic wave (SAW) sensors are widely used in measurement and identification systems, and applicated in different fields such as measuring high temperatures in harsh environmental conditions [1]- [3], pressure [4], [5], torque [6], [7], magnetic and humidity [8] or in identification tags (ID-tag) by their superiority as no battery or do not require any power supply to operate, wireless, small, made on highly stable materials. Using passive wireless SAW sensors requires a reader to transmit radio frequency (RF) signals and receive reflected signals that carry measurement information.…”

Section: Introductionmentioning

confidence: 99%

A calculation method of the passive wireless surface acoustic wave sensor response phase

Ha¹,

Thai²,

Cung³

et al. 2023

Bulletin EEI

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In this research, we propose a method to calculate the phase delay angle of the reflected wave compared to the wave emitted from the interdigital transducer (IDT) of a passive wireless surface acoustic wave (SAW) sensor by combining simulation of the finite element method (FEM) and MATLAB. Based on the result, we consider the influence of the reflector position on the phase delay of the SAW sensor consisting of an IDT and three equally spaced reflectors. The distances between the IDT and the first reflector are 870 micrometers, 939.6 micrometers, and 1009.2 micrometers, and the distances between the reflector positions are 452.4 micrometers, 522 micrometers, and 591.6 micrometers. The outputs of the FEM simulation, including delay time, amplitude loss, and the length of the reflected wave are put into the model in MATLAB to determine the phase delay of the response waves. The obtained phase delay results show that as the distance between the IDT and the reflectors increases, the phase delay angle increases to 4.49 degrees, 5.39 degrees, and 5.78 degrees, respectively.

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“…According to the reported SAW torque sensor data [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ], most of these sensors use quartz as a piezoelectric substrate material, and the characteristic frequency is around 433 MHz. Low-temperature sensitivity can be achieved by using the specific cut shape of the piezoelectric body.…”

Section: Introductionmentioning

confidence: 99%

A Three-Dimensional Finite Element Analysis Model of SAW Torque Sensor with Multilayer Structure

Wang

et al. 2022

Sensors

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A three-dimensional finite element analysis model of surface acoustic wave (SAW) torque sensor based on multilayer structure is proposed in this paper. Compared with the traditional saw torque sensor with quartz as piezoelectric substrate, the SAW torque sensor with multilayer structure has the advantages of fast propagation speed and high characteristic frequency. It is a very promising torque sensor, but there is very little related research. In order to successfully develop the sensor, it is essential to understand the propagation characteristics and torque sensing mode of SAW in multilayer structure. Therefore, in this study, we first established a multi-layered finite element analysis model of SAW device based on IDT/128° Y-X lithium niobate/diamond/Si (100). Then, the effects of different film thicknesses on the characteristic frequency, electromechanical coupling coefficient, s parameter, and mechanical quality factor of SAW device without changing the wavelength are analyzed. Then, based on the finite element analysis, a three-dimensional research model of a new SAW torque sensor suitable for small diameter torsion bar (d = 10 mm) is established, and the relationship between saw device deformation and torque under the condition of small torque (±40 Nm) is tested. The shape variable is introduced into the finite element analysis model of multi-layer SAW device. Finally, the relationship between saw torque sensor with multi-layer structure and torque is established by using the deformation relationship, which shows the perfect curve of sensor performance.

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SAW torque sensor for marine applications

Cited by 12 publications

References 3 publications

Improving Water Pressure Measurement Using Temperature-Compensated Wireless Passive SAW Bidirectional RDL Pressure Sensor

Improving Water Pressure Measurement Using Temperature-Compensated Wireless Passive SAW Bidirectional RDL Pressure Sensor

A calculation method of the passive wireless surface acoustic wave sensor response phase

A Three-Dimensional Finite Element Analysis Model of SAW Torque Sensor with Multilayer Structure

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