A Miniature Layered SAW Contact Stress Sensor for Operation in Cramped Metallic Slits

Li, Haining; Ding, Jiexiong; Wei, Siqi; Chu, Bowen; Guan, Lichao; Du, Liang; Liu, Guangmin; He, Jianguo

doi:10.1134/s0020441218040097

Cited by 9 publications

(4 citation statements)

References 10 publications

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“…This method of detecting resonant frequencies has several advantages. The new method does not require any galvanic connection of a transducer (

) to evaluate electronics, and apart from the other similar measurement methods proposed in [ 1 , 2 , 3 , 4 , 5 ], this method does not need expensive and large equipment to evaluate the information about applied force.…”

Section: Discussionmentioning

confidence: 99%

“…The use of antennas, particularly patch antennas connected directly to the sensing element, appears to be a popular and effective topic for such studies. A very interesting idea proved to be the connection of the sensing element to the antenna via a micro-strip transmission line, as presented in [ 2 ]. The study develops a millimeter-sized sensing element that can measure pressures up to 4 MPa using surface acoustic wave SAW)-sensing technology.…”

Section: Introductionmentioning

confidence: 99%

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Towards a MEMS Force Sensor via the Electromagnetic Principle

Hartansky

Mierka

Jančárik

et al. 2023

Sensors

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Force measurement is a science discipline that experiences significant progress with the introduction of new materials and evaluation methods. Many different sensor types, working on different principles, have been developed and reviewed and have found use in medicine as well as many other industries. New trends and demands require a size reduction and simple applicability, with the use of, for example, micro electromechanical systems (MEMS). For purposes of this study, the initial MEMS body is supplemented by its scaled version. Force measurement in this study works on the force to time-delay conversion principle. A compact compliant mechanical body (CCMB) with an embedded parallel resonant circuit (PRC) acting as a transducer realizes the conversion. Depending on the resonant frequency of the transducer (CCMB or MEMS), we have measured the applied force based on the reverse influence of the transducer on the surrounding EM field. The analysis shows that the transducer’s resonant frequency has a detectable reverse influence on the voltage-controlled oscillator (VCO) DC supply current. The force influencing the transducer is determined by the DC supply current ripple position during the VCO frequency sweep. The study presents the method proposal and mathematical analysis, as well as its function verification by simulation and prototype measurements. The proposed principle was validated on a CCMB prototype capable of measuring forces up to ∼2.5 N at a sampling frequency of ∼23 kHz, while the measured time-delay ranges from 14.5 µs to 27.4 µs.

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“…This method of detecting resonant frequencies has several advantages. The new method does not require any galvanic connection of a transducer (

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Towards a MEMS Force Sensor via the Electromagnetic Principle

Hartansky

Mierka

Jančárik

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…Similar to LC sensors, we have strain sensors which can be SAW based [87][88][89][90], or even some RFID based strain sensors [91]. These strain sensors don't really sense the contact force but are capable of sensing the shear forces which create elongations.…”

Section: Joint Communication and Sensing Based Sensorsmentioning

confidence: 99%

WiForceSticker: Batteryless, Thin Sticker-like Flexible Force Sensor

Gupta¹,

Park²,

Bashar³

et al. 2022

Preprint

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Any two objects in contact with each other exert a force that could be simply due to gravity or mechanical contact, such as a robotic arm gripping an object or even the contact between two bones at our knee joints. The ability to naturally measure and monitor these contact forces allows a plethora of applications from warehouse management (detect faulty packages based on weights) to robotics (making a robotic arms' grip as sensitive as human skin) and healthcare (knee-implants). It is challenging to design a ubiquitous force sensor that can be used naturally for all these applications. First, the sensor should be small enough to fit in narrow joints or not make the robotic arm bulky. Next, we don't want to lay long, cumbersome cables to read the force values from the sensor to the monitoring device. And finally, even current wireless technology requires a battery that could be hazardous for in-body applications. We develop WiForceSticker, a wireless, battery-free, sticker-like force sensor that can be ubiquitously deployed on any surface, such as all warehouse packages, robotic arms, and knee joints. WiForceSticker first designs a tiny 4 mm × 2 mm × 0.4 mm capacitative sensor design equipped with a 10 mm × 10 mm antenna designed on a flexible PCB substrate. Secondly, it introduces a new mechanism to transduce the force information on ambient RF radiations that can be read by a remotely located reader wirelessly without requiring any battery or active components at the force sensor, by interfacing the sensors with COTS RFID systems. The sensor can detect forces in the range of 0-6 N with sensing accuracy of < 0.5 N across multiple testing environments and evaluated with over 10, 000 varying force level presses on the sensor. We also showcase two application case studies with our designed sensors, weighing warehouse packages and sensing forces applied by bone joints.

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“…Alongside the quest to sense the contact forces, there has been a large body of research on strain sensors [51][52][53][54][55]. In strain sensing, instead of sensing the normal transversal force acting on the sensor, the longitudinal force is sensed.…”

Section: Related Workmentioning

confidence: 99%

WiForce: Wireless Sensing and Localization of Contact Forces on a Space Continuum

Gupta,

Girerd,

Dunna

et al. 2020

Preprint

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Contact force is a natural way for humans to interact with the physical world around us. However, most of our interactions with the digital world are largely based on a simple binary sense of touch (contact or no contact). Similarly, when interacting with robots to perform complex tasks, such as surgery, richer force information that includes both magnitude and contact location is important for task performance. To address these challenges, we present the design and fabrication of Wi-Chlorian 1 , which is a 'wireless' sensor that can be attached to an object or robot, like a sticker. Wi-Chlorian's sensor transduces force magnitude and location into phase changes of an incident RF signal, which is reflected back to enable measurement of force magnitude and contact location. Wi-Chlorian's sensor is designed to support wideband frequencies all the way up to 3 GHz. We evaluate the force sensing wirelessly in different environments, including through phantom tissue, and achieve force accuracy of 0.3 N and contact location accuracy of 0.6 mm.

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A Miniature Layered SAW Contact Stress Sensor for Operation in Cramped Metallic Slits

Cited by 9 publications

References 10 publications

Towards a MEMS Force Sensor via the Electromagnetic Principle

Towards a MEMS Force Sensor via the Electromagnetic Principle

WiForceSticker: Batteryless, Thin Sticker-like Flexible Force Sensor

WiForce: Wireless Sensing and Localization of Contact Forces on a Space Continuum

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