SAW RFID-Tags for Mass-Sensitive Detection of Humidity and Vapors

Lieberzeit, Peter A.; Palfinger, Ursula; Dickert, Franz L.; Fischerauer, Gerhard

doi:10.3390/s91209805

Cited by 22 publications

(13 citation statements)

References 15 publications

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“…In recent years, several SAW embodiments have been proposed for wireless, passive SAW sensors [ 17 , 18 ], and these may be practical for portable or wireless sensor networks (WSN). Numerous designers presented the option of integrating general WSN platforms with sensor devices for a variety of applications [ 19 , 20 , 21 ], and several wireless and passive SAW-based sensors have been used to detect organophosphorus compounds [ 22 ], CO 2 , NO 2 or humidity [ 23 , 24 , 25 ]. Several studies on wireless chemical sensors and algorithms for SAW sensors were reviewed [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Surface Acoustic Wave Sensor Array Based on Wireless Communication Network

Pan¹,

Mu²,

Liu³

et al. 2018

Sensors

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A novel surface acoustic wave (SAW) sensor array based on wireless communication network is prepared. The array is composed of four SAW sensors, a wireless communication network module, and a global positioning system (GPS) module. The four SAW sensors of the array are coated with triethanolamine, polyepichlorohydrin, fluoroalcoholpolysiloxane, and L-glutamic acid hydrochloride to detect hydrogen sulfide (H2S), 2-chloroethyl ethyl sulfide (CEES), dimethylmethylphosphonate (DMMP), and ammonia (NH3) at film thicknesses of 50–100 nm. The wireless communication network module consists of an acquisition unit, a wireless control unit, and a microcontroller unit. By means of Zigbee and Lora technologies, the module receives and transmits the collected data to a PC work station in real-time; moreover, the module can control the sensor array’s working mode and monitor the working status. Simultaneously, the testing location is determined by the GPS module integrated into the SAW sensor array. H2S, CEES, DMMP, and NH3 are detected in 300 m at different concentrations. Given the practical future application in environment in the future, the low, safe concentrations of 1.08, 0.59, 0.10, and 5.02 ppm for H2S, CEES, DMMP, and NH3, respectively, are detected at the lowest concentration, and the sensitivities of different sensors of the sensor array are 32.4, 14.9, 78.1 and 22.6 Hz/ppm, respectively. With the obtained fingerprints and pattern recognition technology, the detected gases can be recognized.

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Section: Introductionmentioning

confidence: 99%

A Novel Surface Acoustic Wave Sensor Array Based on Wireless Communication Network

Pan¹,

Mu²,

Liu³

et al. 2018

Sensors

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“…SAW RFID tags for mass-sensitive detection of humidity and vapors have been developed. With the SAW RFID tags (with polyvinyl alcohol layer) developed by Lieberzeit et al [86], it is possible to distinguish humidity differences being as small as 1 % RH. Such polymer-based affinity sensors are especially interesting for humidity range below 20 % RH, when other sensors fail at lower RH, as the uncoated lithium niobate SAW (or RFID tag) devices.…”

Section: Measurement Of Volatile Organic Compoundsmentioning

confidence: 99%

Radiofrequency Identification and Surface Acoustic Wave Technologies for Developing the Food Intelligent Packaging Concept

et al. 2014

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The food intelligent packaging (IP) technologies are reviewed with a particular emphasis on the possibilities of radiofrequency identification (RFID) and surface acoustic wave (SAW) technologies for developing the food IP concept. Passive RFID and SAW technologies are the more promising ones to achieve a food IP that can wirelessly communicate the food quality to the different agents of the food chain. However, some drawbacks and cost of these technologies are limiting their massive use in food IP. This is the reason why a lot of research works are being currently performed that focus on increasing functionality (e.g., enabling the tag antenna as a sensing device) and reducing costs of components and materials of these RFID and SAW systems. Furthermore, benefits can be also achieved by means of integrating the RFID, SAW, and other sensing technologies. The RFID and SAW technologies can be embedded in a wireless sensor network (WSN), and the corresponding tags and readers can build more intelligent networks by sharing the sensing, logic, and transmission capabilities of the sensor networks. The above two technologies can be integrated in two different ways: sensor-enabled tags-RFID or SAW (or RFID or SAW sensor tags)-and RFID and/or SAW-embedded WSN. The application of these technologies on secondary packages, as the paperboard packages, can dilute the costs of application on primary packaging and allow the massive use of these technologies in the food supply chain.

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“…SAW-based RFID tags have been proposed for mass application due to their advantages of low cost, small size, low radiation power and robustness [ 18 ]. In particular, SAW tags, which can easily incorporate sensor functions, show an inherent capability for operation as sensors [ 22 ]. To date, SAW RFID built-in temperature sensors have been widely investigated with a variety of structures [ 23 , 24 , 25 ] and materials [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of 2.45 GHz Passive SAW Temperature Sensors with BPSK Coded RFID Configuration

et al. 2017

Sensors

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A surface acoustic wave based passive temperature sensor capable of multiple access is investigated. Binary Phase Shift Keying (BPSK) codes of eight chips were implemented using a reflective delay line scheme on a Y-Z LiNbO3 piezoelectric substrate. An accurate simulation based on the combined finite- and boundary element method (FEM/BEM) was performed in order to determine the optimum design parameters. The scaling factor ‘s’ and time delay factor ‘τ’ were extracted using signal processing techniques based on the wavelet transform of the correlation function, and then evaluated at various ambient temperatures. The scaling factor ‘s’ gave a more stable and reliable response to temperature than the time delay factor ‘τ’. Preliminary results show that the sensor response is fast and consistent subject to ambient temperature and it exhibits good linearity of 0.9992 with temperature varying from 0 to 130 °C.

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SAW RFID-Tags for Mass-Sensitive Detection of Humidity and Vapors

Cited by 22 publications

References 15 publications

A Novel Surface Acoustic Wave Sensor Array Based on Wireless Communication Network

A Novel Surface Acoustic Wave Sensor Array Based on Wireless Communication Network

Radiofrequency Identification and Surface Acoustic Wave Technologies for Developing the Food Intelligent Packaging Concept

Design and Implementation of 2.45 GHz Passive SAW Temperature Sensors with BPSK Coded RFID Configuration

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